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Heating, AC, Plumbing & Indoor Air Quality Services in Winnetka, IL

Winnetka Service Overview

  • Indian Hill: Indian Hill is known for large lots and architecturally significant estates.
  • Hubbard Woods: Hubbard Woods combines residential streets with shopping, dining, community events, and its Metra station.
  • East & West Winnetka: East Winnetka extends toward Lake Michigan and Centennial Park, while West Winnetka is primarily residential with a strong concentration of pre-war homes.

 

Winnetka is not a place where every service call starts with the same kind of house or the same kind of system. A property near Hubbard Woods can present a completely different setup from an estate in Indian Hill or a home closer to Centennial Park and the Lake Michigan shoreline.

Deljo Heating, Cooling & Plumbing works throughout 60093, helping Winnetka homeowners repair, maintain, and replace heating, cooling, plumbing, and indoor air quality systems. Call 773-829-4295 or contact us online to schedule service.

technicians in front of truck

What We See in Winnetka Homes

There is a lot of variety packed into Winnetka. Indian Hill is known for large lots and architecturally significant estates. Hubbard Woods combines residential streets with shopping, dining, community events, and its Metra station. East Winnetka extends toward Lake Michigan and Centennial Park, while West Winnetka is primarily residential with a strong concentration of pre-war homes.

Architecture is a major part of the local landscape as well. George Washington Maher, Walter Burley Griffin, Howard Van Doren Shaw, and David Adler all designed homes in Winnetka. Crow Island Elementary School, designed by Eliel and Eero Saarinen in 1940, is another major architectural landmark and a National Historic Landmark.

For us, those differences mean one thing: look at the house, understand the system, and solve the problem that is actually there.

Solving HVAC, Plumbing & Indoor Air Quality Issues in Winnetka

Problem: Boilers and steam heat remain a meaningful part of the Winnetka service picture. More than half of the village’s housing was built before 1939, and more than 75% predates 1970. Older estate homes, including properties around Indian Hill and West Winnetka, are among the places where these systems remain especially relevant.

Solution: Central furnaces are also common, so heating service here is far from limited to boilers. Homeowners considering replacement can also look at high-efficiency equipment, zoning, and upgraded controls.

Problem: A plumbing problem does not care whether you are headed to the Winnetka Music Festival, spending the afternoon near Centennial Park, or simply trying to get through the morning at home. When a drain, water heater, pipe, fixture, or sewer line needs attention, the priority is getting the system working correctly again.

Solution: Water heater replacement, fixture upgrades, and drain service are all important parts of the Winnetka plumbing market. Larger projects can extend to repiping, sewer work, flood control, and other system improvements.

Problem: Larger Winnetka homes can create another challenge: getting the whole house to feel the way you want it to feel. Estate-scale properties make zoning and whole-home controls especially relevant because different levels or areas of a house may need more precise management.

Solution: Filtration, purification, humidity control, thermostats, and zoning give homeowners options beyond replacing the furnace or AC unit alone. These systems can be considered together when the goal is better control across the entire property.

Air Conditioning Repair & Installation in Winnetka, IL

Repairmen works on a home's air conditioner unit outdoors.

An AC call near Hubbard Woods may take us into a very different property from one near the estates of Indian Hill. Central air conditioning is common throughout Winnetka’s single-family housing, while high-efficiency replacement is an option for homeowners ready to update older equipment.

Deljo handles:

Hubbard Woods is one of Winnetka’s most recognizable neighborhood centers, with boutique shopping, dining, merchant events, and Metra service. Farther east, Centennial Park brings beach access, tennis courts, and recreation to the Lake Michigan side of the village.

Those settings are different, and the homes around them can be different too. That is why we start with the existing cooling system instead of approaching every Winnetka AC call with the same answer.

“Gabe was wonderful! I called them when my tenants AC went out during the heat wave, and they were able to get over and get everything sorted extremely quickly. He was very thorough and told me everything that was going on even though I was not physically there. Really appreciate the great work!”

Laura S

Beat the summer heat with reliable AC repairs and high-efficiency cooling upgrades. Call 773-829-4295 to book your cooling service!

Winnetka Boiler, Furnace & Heating Services

Boilers and steam heat remain a meaningful part of the Winnetka service picture. More than half of the village’s housing was built before 1939, and more than 75% predates 1970. Older estate homes, including properties around Indian Hill and West Winnetka, are among the places where these systems remain especially relevant.

Heating work can include:

Central furnaces are also common, so heating service here is far from limited to boilers. Homeowners considering replacement can also look at high-efficiency equipment, zoning, and upgraded controls.

Indian Hill gives this part of the article a distinctly Winnetka setting. The neighborhood sits along the western edge of the village and is known for larger lots, estate properties, and significant residential architecture. Indian Hill Club is another longstanding landmark in this part of the community.

“GregoryZ had our ancient AC compressor back up-and-running in an hour. He even arrived earlier than scheduled before it got really warm out. Great service.”

Mike D

Stay warm all winter long! Call Deljo at 773-829-4295 or schedule your heating service online today.

Plumbing Help for Winnetka Homeowners

pipe repair

A plumbing problem does not care whether you are headed to the Winnetka Music Festival, spending the afternoon near Centennial Park, or simply trying to get through the morning at home. When a drain, water heater, pipe, fixture, or sewer line needs attention, the priority is getting the system working correctly again.

Deljo provides plumbing services such as:

Water heater replacement, fixture upgrades, and drain service are all important parts of the Winnetka plumbing market. Larger projects can extend to repiping, sewer work, flood control, and other system improvements.

One address almost everyone associates with Winnetka is 671 Lincoln Avenue, better known as the “Home Alone” house. It remains a year-round attraction and draws particular attention around Christmas. It is one of several residential landmarks that make Winnetka recognizable well beyond the North Shore.

Facing a drain clog, water heater issue, or pipe repair? Call 773-829-4295 now for fast, expert plumbing service in Winnetka!

Whole-Home Air Quality & Comfort Controls in Winnetka

Larger Winnetka homes can create another challenge: getting the whole house to feel the way you want it to feel. Estate-scale properties make zoning and whole-home controls especially relevant because different levels or areas of a house may need more precise management.

Deljo can help with:

A heating and cooling technician uses a device to measure how efficiently a furnace is running.
Filtration, purification, humidity control, thermostats, and zoning give homeowners options beyond replacing the furnace or AC unit alone. These systems can be considered together when the goal is better control across the entire property.

That whole-home approach is particularly relevant in areas such as Indian Hill, where large residential properties are part of the neighborhood character.

“Donny from Deljo did a great job. He was efficient and knowledgeable and kept me in the loop.”

Tarek H

Improve your Winnetka home comfort and indoor air quality. Call 773-829-4295 or contact us online to schedule service.

Life Around Winnetka Extends Well Beyond the House

Service calls take us into the residential side of Winnetka, but the community has plenty of recognizable activity outside those neighborhoods.

The Winnetka Music Festival turns the downtown area into a two-day summer concert destination and draws approximately 5,500 people, primarily from Winnetka and nearby North Shore communities. Hubbard Woods hosts merchant programming, and the Winnetka Park District offers activities throughout the year.

Centennial Park gives residents access to the lakefront, while Crow Island Elementary School represents another side of the village’s architectural history. Together with Indian Hill, Hubbard Woods, East Winnetka, and West Winnetka, these places give different sections of 60093 their own identity.

Need HVAC or Plumbing Service in Winnetka?

You may be calling about an old boiler, an AC system that suddenly stopped working, a plumbing repair, or a house where one thermostat is no longer giving you the control you want. The address might be near Hubbard Woods, Indian Hill, Centennial Park, or somewhere between the lakefront and Winnetka’s western edge.

“Gabe was wonderful! I called them when my tenants AC went out during the heat wave, and they were able to get over and get everything sorted extremely quickly. He was very thorough and told me everything that was going on even though I was not physically there. Really appreciate the great work!”

Laura S

What matters first is understanding what is happening in your home and giving you a clear way forward. Call Deljo Heating, Cooling & Plumbing at 773-829-4295 or contact us online for heating, cooling, plumbing, or indoor air quality service in Winnetka.

Frequently Asked Questions

What heating systems does Deljo service in Winnetka?

A: Deljo handles boiler service, furnace repair, furnace installation, heating maintenance, heat pump service, and heating system replacement in Winnetka.

Are boilers and steam heat common in Winnetka?

A: Boilers and steam heat remain a meaningful part of the Winnetka service picture. More than half of the village’s housing was built before 1939, and more than 75% predates 1970. Older estate homes, including properties around Indian Hill and West Winnetka, are among the places where these systems remain especially relevant.

What plumbing services does Deljo provide in Winnetka?

A: Deljo provides emergency plumbing, drain cleaning, water heaters, whole-home water filters, pipe repair, frozen pipe service, flood control, sump pumps, plumbing fixtures, repiping, sewer lines, and showers and bathtubs.

Does Deljo provide AC repair and installation in Winnetka?

A: Yes. Deljo handles AC repair, AC installation, AC maintenance, heat pump service, and ductless AC in Winnetka. Central air conditioning is common throughout Winnetka’s single-family housing, while high-efficiency replacement is an option for homeowners ready to update older equipment.

What indoor air quality services are available in Winnetka?

A: Deljo can help with air duct cleaning, Aeroseal, indoor air quality inspection and testing, air filtration, purifying ionizers, air purifiers, whole-home humidifiers, whole-home dehumidifiers, thermostats, and AC coil and condenser cleaning.

Why can zoning be useful in larger Winnetka homes?

A: Estate-scale properties make zoning and whole-home controls especially relevant because different levels or areas of a house may need more precise management. Zoning and thermostat upgrades can add another level of control to the heating and cooling system itself.

What areas of Winnetka does Deljo serve?

A: Deljo works throughout 60093, including areas such as Hubbard Woods, Indian Hill, Centennial Park, East Winnetka, and West Winnetka.

Page Updated on September 19, 2026

Recent Jobs and Reviews in Winnetka, IL

Winnetka, IL at a glance

Deljo Heating, Cooling & Plumbing has completed 18 jobs in Winnetka, IL between February 2026 and May 2026.

The most recent job was on May 11, 2026.

Deljo Heating, Cooling & Plumbing has completed 98 jobs in Winnetka, IL in the last 12 months.

Job Locations and Reviews

Completed general service maintenance on two air conditioning systems. Inspected electrical components, capacitors, and wiring connections on outdoor condensing unit, verified proper operation and documented equipment conditions. Performed system evaluation on indoor air handler unit, checked airflow direction markings on PVC drainage lines, and confirmed all mechanical components functioning within normal parameters.
Completed general service maintenance on two air conditioning systems. Inspected electrical components, capacitors, and wiring connections on outdoor condensing unit, verified proper operation and documented equipment conditions. Performed system evaluation on indoor air handler unit, checked airflow direction markings on PVC drainage lines, and confirmed all mechanical components functioning within normal parameters.
Jay L.
Jay L. Checked in
Completed general service maintenance on two air conditioning systems. Inspected electrical components, capacitors, and wiring connections on outdoor condensing unit, verified proper operation and documented equipment conditions. Performed system evaluation on indoor air handler unit, checked airflow direction markings on PVC drainage lines, and confirmed all mechanical components functioning within normal parameters.
Winnetka, IL 60093
Completed preventative maintenance agreement covering three air conditioning systems and one furnace blower unit. Performed comprehensive system checks including refrigerant pressure testing, visual inspection of all equipment, and operational verification of HVAC components. Filter media replacement not included per service agreement terms.
Completed preventative maintenance agreement covering three air conditioning systems and one furnace blower unit. Performed comprehensive system checks including refrigerant pressure testing, visual inspection of all equipment, and operational verification of HVAC components. Filter media replacement not included per service agreement terms.
Sam A.
Sam A. Checked in
Completed preventative maintenance agreement covering three air conditioning systems and one furnace blower unit. Performed comprehensive system checks including refrigerant pressure testing, visual inspection of all equipment, and operational verification of HVAC components. Filter media replacement not included per service agreement terms.
Winnetka, IL 60093
Completed emergency residential AC replacement for 15-year-old failed system. Removed existing outdoor condensing unit and installed new air conditioning system on concrete pad adjacent to building with gray siding. Unit positioned in side yard area with proper clearances maintained from structure and landscaping. Connected electrical conduit to exterior wall and verified all refrigerant lines, electrical connections, and drainage systems functioning properly. System tested and operational upon completion.
Completed emergency residential AC replacement for 15-year-old failed system. Removed existing outdoor condensing unit and installed new air conditioning system on concrete pad adjacent to building with gray siding. Unit positioned in side yard area with proper clearances maintained from structure and landscaping. Connected electrical conduit to exterior wall and verified all refrigerant lines, electrical connections, and drainage systems functioning properly. System tested and operational upon completion.
Jake R.
Jake R. Checked in
Completed emergency residential AC replacement for 15-year-old failed system. Removed existing outdoor condensing unit and installed new air conditioning system on concrete pad adjacent to building with gray siding. Unit positioned in side yard area with proper clearances maintained from structure and landscaping. Connected electrical conduit to exterior wall and verified all refrigerant lines, electrical connections, and drainage systems functioning properly. System tested and operational upon completion.
Winnetka, IL 60093
Completed comprehensive HVAC maintenance agreement service on dual-zone system including two outdoor condensing units and indoor air handler with furnace. Performed routine maintenance procedures on both exterior condensers, replaced two media filters (16x25x4 and 20x25x4) per agreement specifications, and verified proper operation of all system components.
Completed comprehensive HVAC maintenance agreement service on dual-zone system including two outdoor condensing units and indoor air handler with furnace. Performed routine maintenance procedures on both exterior condensers, replaced two media filters (16x25x4 and 20x25x4) per agreement specifications, and verified proper operation of all system components.
Sam A.
Sam A. Checked in
Completed comprehensive HVAC maintenance agreement service on dual-zone system including two outdoor condensing units and indoor air handler with furnace. Performed routine maintenance procedures on both exterior condensers, replaced two media filters (16x25x4 and 20x25x4) per agreement specifications, and verified proper operation of all system components.
Winnetka, IL 60093
Completed routine HVAC maintenance agreement service on residential air conditioning system. Performed comprehensive system inspection of Lennox condenser unit located in exterior landscaped area and indoor air handler components. Installed new 16x25x1 filter in return air plenum, verified proper airflow, and conducted general system evaluation. All equipment operating within normal parameters at time of service completion.
Completed routine HVAC maintenance agreement service on residential air conditioning system. Performed comprehensive system inspection of Lennox condenser unit located in exterior landscaped area and indoor air handler components. Installed new 16x25x1 filter in return air plenum, verified proper airflow, and conducted general system evaluation. All equipment operating within normal parameters at time of service completion.
Jay L.
Jay L. Checked in
Completed routine HVAC maintenance agreement service on residential air conditioning system. Performed comprehensive system inspection of Lennox condenser unit located in exterior landscaped area and indoor air handler components. Installed new 16x25x1 filter in return air plenum, verified proper airflow, and conducted general system evaluation. All equipment operating within normal parameters at time of service completion.
Winnetka, IL 60093
Returned to property to complete pilot assembly replacement on water heater. Installed new Resideo gas control valve assembly with rotary dial featuring OFF, PILOT, W.C., LOW, and HOT settings. Connected brass fittings and flexible metallic tubing to gas control unit rated at 4" w.c. outlet pressure. Verified proper installation of safety warning labels regarding explosion risks. Tested pilot ignition system and confirmed operational status using diagnostic indicator panel on control face. System now heating properly with all safety controls functioning as designed.
Returned to property to complete pilot assembly replacement on water heater. Installed new Resideo gas control valve assembly with rotary dial featuring OFF, PILOT, W.C., LOW, and HOT settings. Connected brass fittings and flexible metallic tubing to gas control unit rated at 4" w.c. outlet pressure. Verified proper installation of safety warning labels regarding explosion risks. Tested pilot ignition system and confirmed operational status using diagnostic indicator panel on control face. System now heating properly with all safety controls functioning as designed.
Gabe G.
Gabe G. Checked in
Returned to property to complete pilot assembly replacement on water heater. Installed new Resideo gas control valve assembly with rotary dial featuring OFF, PILOT, W.C., LOW, and HOT settings. Connected brass fittings and flexible metallic tubing to gas control unit rated at 4" w.c. outlet pressure. Verified proper installation of safety warning labels regarding explosion risks. Tested pilot ignition system and confirmed operational status using diagnostic indicator panel on control face. System now heating properly with all safety controls functioning as designed.
Winnetka, IL 60093
Responded to callback for 2-year-old Carrier AC/HP system displaying error messages and suspected frozen coil condition. Upon arrival, performed diagnostic checkout using thermostat's built-in system test mode to verify operational parameters including temperature differentials, pressures, and staging functions. Measured supply air temperature at 50.3°F using calibrated digital thermometer at plenum to confirm proper cooling operation and rule out frozen evaporator coil. Verified system pressures reading 14.0 PSI with discharge temperature at 119°F and return air at 65°F, all within normal operating range. Cleared error codes and confirmed unit cycling properly through all stages without fault conditions present.
Responded to callback for 2-year-old Carrier AC/HP system displaying error messages and suspected frozen coil condition. Upon arrival, performed diagnostic checkout using thermostat's built-in system test mode to verify operational parameters including temperature differentials, pressures, and staging functions. Measured supply air temperature at 50.3°F using calibrated digital thermometer at plenum to confirm proper cooling operation and rule out frozen evaporator coil. Verified system pressures reading 14.0 PSI with discharge temperature at 119°F and return air at 65°F, all within normal operating range. Cleared error codes and confirmed unit cycling properly through all stages without fault conditions present.
Gabe G.
Gabe G. Checked in
Responded to callback for 2-year-old Carrier AC/HP system displaying error messages and suspected frozen coil condition. Upon arrival, performed diagnostic checkout using thermostat's built-in system test mode to verify operational parameters including temperature differentials, pressures, and staging functions. Measured supply air temperature at 50.3°F using calibrated digital thermometer at plenum to confirm proper cooling operation and rule out frozen evaporator coil. Verified system pressures reading 14.0 PSI with discharge temperature at 119°F and return air at 65°F, all within normal operating range. Cleared error codes and confirmed unit cycling properly through all stages without fault conditions present.
Winnetka, IL 60093
Performed comprehensive maintenance on three air conditioning units and one air handler as part of annual agreement service. Completed thorough system inspection including electrical components, capacitors, and wiring connections. Installed new air filters: two 16x25x2 filters and one 16x25x4 filter. Verified proper operation of all equipment, checked refrigerant lines, and documented system conditions with photographs. Customer advised that annual agreement renewal is required for continued coverage of cleaning services.
Performed comprehensive maintenance on three air conditioning units and one air handler as part of annual agreement service. Completed thorough system inspection including electrical components, capacitors, and wiring connections. Installed new air filters: two 16x25x2 filters and one 16x25x4 filter. Verified proper operation of all equipment, checked refrigerant lines, and documented system conditions with photographs. Customer advised that annual agreement renewal is required for continued coverage of cleaning services.
Gabe G.
Gabe G. Checked in
Performed comprehensive maintenance on three air conditioning units and one air handler as part of annual agreement service. Completed thorough system inspection including electrical components, capacitors, and wiring connections. Installed new air filters: two 16x25x2 filters and one 16x25x4 filter. Verified proper operation of all equipment, checked refrigerant lines, and documented system conditions with photographs. Customer advised that annual agreement renewal is required for continued coverage of cleaning services.
Winnetka, IL 60093
Responded to no heat call for residential boiler system. Upon arrival, confirmed boiler and domestic water heater were inoperative due to extinguished pilot lights. Successfully relit pilots on both units, verified proper ignition and flame characteristics, and confirmed system returned to normal operation. Tested thermostat communication and observed boiler cycling properly through heating demand. Verified water heater pilot stability and burner operation. System restored to full functionality with both heating and domestic hot water operating as designed.
Responded to no heat call for residential boiler system. Upon arrival, confirmed boiler and domestic water heater were inoperative due to extinguished pilot lights. Successfully relit pilots on both units, verified proper ignition and flame characteristics, and confirmed system returned to normal operation. Tested thermostat communication and observed boiler cycling properly through heating demand. Verified water heater pilot stability and burner operation. System restored to full functionality with both heating and domestic hot water operating as designed.
Gabe G.
Gabe G. Checked in
Responded to no heat call for residential boiler system. Upon arrival, confirmed boiler and domestic water heater were inoperative due to extinguished pilot lights. Successfully relit pilots on both units, verified proper ignition and flame characteristics, and confirmed system returned to normal operation. Tested thermostat communication and observed boiler cycling properly through heating demand. Verified water heater pilot stability and burner operation. System restored to full functionality with both heating and domestic hot water operating as designed.
Winnetka, IL 60093
Completed comprehensive maintenance agreement service on two air conditioning systems. Performed courtesy checks on both units, installed 16x25x4 filters, and conducted general system inspections. Both systems operational with thermostats displaying proper temperature readings at time of service completion.
Completed comprehensive maintenance agreement service on two air conditioning systems. Performed courtesy checks on both units, installed 16x25x4 filters, and conducted general system inspections. Both systems operational with thermostats displaying proper temperature readings at time of service completion.
Charlie B.
Charlie B. Checked in
Completed comprehensive maintenance agreement service on two air conditioning systems. Performed courtesy checks on both units, installed 16x25x4 filters, and conducted general system inspections. Both systems operational with thermostats displaying proper temperature readings at time of service completion.
Winnetka, IL 60093
Responded to no cooling complaint on 10+ year old system displaying low pressure lockout and frozen coil error codes. Upon inspection, measured supply air temperature at 53.6°F, confirming inadequate cooling performance and indicating restricted airflow or refrigerant issue causing coil to freeze. Documented system conditions with photos showing evaporator coil area and temperature readings for diagnostic purposes.
Responded to no cooling complaint on 10+ year old system displaying low pressure lockout and frozen coil error codes. Upon inspection, measured supply air temperature at 53.6°F, confirming inadequate cooling performance and indicating restricted airflow or refrigerant issue causing coil to freeze. Documented system conditions with photos showing evaporator coil area and temperature readings for diagnostic purposes.
Gregory Z.
Gregory Z. Checked in
Responded to no cooling complaint on 10+ year old system displaying low pressure lockout and frozen coil error codes. Upon inspection, measured supply air temperature at 53.6°F, confirming inadequate cooling performance and indicating restricted airflow or refrigerant issue causing coil to freeze. Documented system conditions with photos showing evaporator coil area and temperature readings for diagnostic purposes.
Winnetka, IL 60093
Conducted on-site assessment for mini split heat pump installation to provide supplemental heating for kitchen area. Evaluated attic space and measured insulation depth for potential future mini split installations on second floor in anticipation of planned home addition. Performed visual inspection of existing central air conditioning system to assess current condition and operation.
Conducted on-site assessment for mini split heat pump installation to provide supplemental heating for kitchen area. Evaluated attic space and measured insulation depth for potential future mini split installations on second floor in anticipation of planned home addition. Performed visual inspection of existing central air conditioning system to assess current condition and operation.
John T.
John T. Checked in
Conducted on-site assessment for mini split heat pump installation to provide supplemental heating for kitchen area. Evaluated attic space and measured insulation depth for potential future mini split installations on second floor in anticipation of planned home addition. Performed visual inspection of existing central air conditioning system to assess current condition and operation.
Winnetka, IL 60093
Completed comprehensive cooling check on two air conditioning systems and air handlers as part of general maintenance service agreement. Inspected ecobee smart thermostat displaying proper operation at 68 degrees in heating mode, verified attic-mounted air handler unit and ductwork installation, confirmed all equipment operating within normal parameters with no deficiencies noted.
Completed comprehensive cooling check on two air conditioning systems and air handlers as part of general maintenance service agreement. Inspected ecobee smart thermostat displaying proper operation at 68 degrees in heating mode, verified attic-mounted air handler unit and ductwork installation, confirmed all equipment operating within normal parameters with no deficiencies noted.
Gabe G.
Gabe G. Checked in
Completed comprehensive cooling check on two air conditioning systems and air handlers as part of general maintenance service agreement. Inspected ecobee smart thermostat displaying proper operation at 68 degrees in heating mode, verified attic-mounted air handler unit and ductwork installation, confirmed all equipment operating within normal parameters with no deficiencies noted.
Winnetka, IL 60093
Performed comprehensive furnace inspection and cleaning for new homeowner. Accessed interior components, inspected blower wheel assembly which showed moderate dust accumulation on blades, examined drainage system and PVC condensate lines, and verified all electrical connections and safety controls were functioning properly. Discussed preventive maintenance membership program options with customer to ensure ongoing system reliability.
Performed comprehensive furnace inspection and cleaning for new homeowner. Accessed interior components, inspected blower wheel assembly which showed moderate dust accumulation on blades, examined drainage system and PVC condensate lines, and verified all electrical connections and safety controls were functioning properly. Discussed preventive maintenance membership program options with customer to ensure ongoing system reliability.
Sam A.
Sam A. Checked in
Performed comprehensive furnace inspection and cleaning for new homeowner. Accessed interior components, inspected blower wheel assembly which showed moderate dust accumulation on blades, examined drainage system and PVC condensate lines, and verified all electrical connections and safety controls were functioning properly. Discussed preventive maintenance membership program options with customer to ensure ongoing system reliability.
Winnetka, IL 60093
Performed comprehensive maintenance inspection on commercial boiler system under preventative maintenance agreement. Monitored and documented system pressure and temperature readings via dual-scale gauge, confirming operational parameters within manufacturer specifications. Inspected boiler components including pressure relief connections and piping systems, noting normal wear patterns consistent with equipment age. Evaluated heat exchanger assembly and identified significant frost accumulation on evaporator coil fins and refrigerant distribution headers, indicating potential airflow restriction or system imbalance requiring attention. Captured photographic documentation of gauge readings and frost buildup conditions for service records and future reference.
Performed comprehensive maintenance inspection on commercial boiler system under preventative maintenance agreement. Monitored and documented system pressure and temperature readings via dual-scale gauge, confirming operational parameters within manufacturer specifications. Inspected boiler components including pressure relief connections and piping systems, noting normal wear patterns consistent with equipment age. Evaluated heat exchanger assembly and identified significant frost accumulation on evaporator coil fins and refrigerant distribution headers, indicating potential airflow restriction or system imbalance requiring attention. Captured photographic documentation of gauge readings and frost buildup conditions for service records and future reference.
Sam A.
Sam A. Checked in
Performed comprehensive maintenance inspection on commercial boiler system under preventative maintenance agreement. Monitored and documented system pressure and temperature readings via dual-scale gauge, confirming operational parameters within manufacturer specifications. Inspected boiler components including pressure relief connections and piping systems, noting normal wear patterns consistent with equipment age. Evaluated heat exchanger assembly and identified significant frost accumulation on evaporator coil fins and refrigerant distribution headers, indicating potential airflow restriction or system imbalance requiring attention. Captured photographic documentation of gauge readings and frost buildup conditions for service records and future reference.
Winnetka, IL 60093
Conducted site assessment and measurements for a gas furnace replacement in a medium-sized residence (1500-3000 sq.ft.) with basement installation location. Documented existing ventilation dimensions and provided customer with quote options for both standard and premium Carrier gas furnace models, both offering up to 80% Nominal AFUE efficiency ratings.
Conducted site assessment and measurements for a gas furnace replacement in a medium-sized residence (1500-3000 sq.ft.) with basement installation location. Documented existing ventilation dimensions and provided customer with quote options for both standard and premium Carrier gas furnace models, both offering up to 80% Nominal AFUE efficiency ratings.
Matthew A.
Matthew A. Checked in
Conducted site assessment and measurements for a gas furnace replacement in a medium-sized residence (1500-3000 sq.ft.) with basement installation location. Documented existing ventilation dimensions and provided customer with quote options for both standard and premium Carrier gas furnace models, both offering up to 80% Nominal AFUE efficiency ratings.
Winnetka, IL 60093
Performed routine maintenance on residential HVAC system under agreement COTW. Inspected furnace unit and connected humidifier, documenting condition of blower motor assembly, electrical connections, and ductwork configuration. All components functioning properly with seasonal damper settings verified.
Performed routine maintenance on residential HVAC system under agreement COTW. Inspected furnace unit and connected humidifier, documenting condition of blower motor assembly, electrical connections, and ductwork configuration. All components functioning properly with seasonal damper settings verified.
Angel G.
Angel G. Checked in
Performed routine maintenance on residential HVAC system under agreement COTW. Inspected furnace unit and connected humidifier, documenting condition of blower motor assembly, electrical connections, and ductwork configuration. All components functioning properly with seasonal damper settings verified.
Winnetka, IL 60093
Completed scheduled maintenance agreement service on two furnaces and two Healthy Climate humidifiers. Inspected all components for proper operation, cleaned systems, and verified thermostat functionality for multi-zone temperature control (1st Floor set to Heat 71°, 2nd Floor set to Heat 68°). All systems functioning within normal parameters.
Completed scheduled maintenance agreement service on two furnaces and two Healthy Climate humidifiers. Inspected all components for proper operation, cleaned systems, and verified thermostat functionality for multi-zone temperature control (1st Floor set to Heat 71°, 2nd Floor set to Heat 68°). All systems functioning within normal parameters.
Giovanni M.
Giovanni M. Checked in
Completed scheduled maintenance agreement service on two furnaces and two Healthy Climate humidifiers. Inspected all components for proper operation, cleaned systems, and verified thermostat functionality for multi-zone temperature control (1st Floor set to Heat 71°, 2nd Floor set to Heat 68°). All systems functioning within normal parameters.
Winnetka, IL 60093

Client Testimonials

Read the opinions of our satisfied customers.

5 stars

This was my first time as a Deljo customer, and I was very pleased. My technician, Giovanni, was very thorough and diligent. He serviced my furnace and identified a faulty sensor that was causing the unit to shut itself down. Deljo ordered the part, and Giovanni replaced it a few days later. Overall, the team at Deljo was great. The dispatcher kept me informed about Giovanni’s arrival time, and the supervisor assisted Giovanni when he was diagnosing the problem with the furnace. I highly recommend Deljo.

Paul D. 10/15/2026

5 stars

I’ve used Deljo for over 10 years now and they always do a good job. Izzy was the technician for this visit and he did an excellent job with my winter maintenance on my multiple units in the household. He also addressed an issue while cleaning the furnace blower wheel. His communication was clear and concise with what he planned to do to address the issue quickly. He was confident and I had 0 concerns or questions. Great job Izzy!

Jeff S. 10/14/2026

5 stars

Paul was great! Arrived on time and completed maintenance on my humidifier, tankless water heater, and two furnaces. All work was performed under my Gold Star maintenance program, so all maintenance charges were covered. Paul did provide a few proposals for additional services on furnace & tankless water heater, but those were emailed to me for further consideration. Paul was friendly, knowledgeable, and answered all my questions.

Jack N. 10/12/2026

5 stars

Gabe did an excellent job with our annual service visit. He arrived in the early part of our service window, was friendly and knowledgeable, and got the work done in a very reasonable amount of time. I have great confidence in Deljo, and am a long-time customer.

Ruth C. 10/9/2026

5 stars

I’ve been using Deljo for 20 years for HVAC but now venture into enlisting their plumbing services. Bashar was very courteous, efficient & informative, and I’d definitely request him again for the next plumbing job. Great experience!

Christopher R. 10/2/2026

5 stars

Working with Deljo is always a good experience, and today’s appointment with Izzy was no different. He was able to come early which actually worked better with our schedules, but called me ahead of time to make sure that was okay. He was friendly and knowledgeable when he explained the work he had done during his visit and our options for fixes. He was also able to schedule a quote appointment for us while he was still here. We would highly recommend working with Izzy and the Deljo team!

Lauren H.  9/25/2026

5 stars

Drew performed the seasonal maintenance on my AC. It needed some repairs and updates and he was able to fix everything at the same appointment. He also noticed issues with the hot water heater and we were able to get ahead of that, as well.

Emily W. 9/11/2026

5 stars

I would leave six out of five stars if I could! My technician Jorge went above and beyond on his service. There was buildup in the rental property’s toilet from the previous tenant. One maintenance person did a surface level job of cleaning but did not fully remove the obstruction. Jorge went above and beyond and came to a solution and even explained the perpetual problems older toilet models can cause. Moving forward with this insight, I can perform my own upkeep the previous tenant did not. Thank you kindly!

Kayla K.  9/15/2026

5 stars

We just had our new boiler installed by Jonathan and Carlos. First rate work! They arrived on time, removed the old boiler, installed the new unit, and explained the features. Both guys were pleasant. Bring on the cold this winter! We are ready thanks to the team from Deljo.

Edward B.  6/26/2026

5 stars

Deljo’s heating and cooling team was awesome to work with. As a first-time homeowner, I really appreciated how clearly they explained everything and answered all my questions. From the quote to the install and follow-up, the service was top-notch. Highly recommend!

Lindsey A. Chicago, IL

5 stars

Matt did an amazing job. He serviced our home and our rental property. He gave us options to help our systems run more efficiently. He also told us about Deljo’s new plumbing inspection which was very affordable. He is great!

Jordan R. Chicago, IL

5 stars

We had a problem with our Humidifier and called Deljo. Jesus came out to help and was amazing. He was extremely knowledgeable, detail oriented, and super courteous. Amazing customer experience!

Jeff C. Chicago, IL

5 stars

Jordan and Jesus were extremely helpful and knowledgeable! We would 100% work with them and have them back. They were both very professional and efficiently fixed our heating system.

Emily L. Chicago, IL

5 stars

Shout out to Ernesto for coming out and servicing our furnace and air con. Deljo provides a great service and glad to trust them with our HVAC for our small business.

Lauren H. Chicago, IL

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