If you need HVAC service in Winnetka, you need look no further than Deljo Heating & Cooling. We’ve been serving homes and businesses throughout the greater Chicagoland area since 1922, and when you’re in need of assistance, we hope Deljo will be the first company you think of for installation, maintenance, and repair services.
Heating Services in Winnetka
Whatever your heating issues, Deljo Heating & Cooling can take care of it.
- Furnace installation – Our technicians are fully licensed, and we install only the highest quality heating systems available today.
- Furnace maintenance – Regular maintenance performed by our expert technicians can prolong the life of your heating system and help reduce your energy costs.
- Furnace repair – The last thing you want is a faulty furnace that leaves you freezing in winter. We also know you can never tell when your furnace is going out on you, and that’s why the furnace repair specialists at Deljo are available 24/7 to handle any heating emergency that occurs, no matter the time or the day!
- Boiler installation, maintenance, and repair – The average boiler should last 10 – 15 years, and if yours is nearing the end of its life span, you may need to consider installing a new boiler before the worst of the winter weather arrives. Deljo can do that for you, and we also provide expert boiler maintenance and repair services.
Cooling Services in Winnetka
The same goes for cooling services. If you need assistance, Deljo is here to provide it in many ways.
- Air conditioning installation – When it comes to AC installation in Winnetka, you don’t want to hire just any company. Let our licensed technicians perform the job to your complete satisfaction.
- Air conditioning maintenance – Regular maintenance of your AC system performed by highly qualified technicians extends the life of your AC unit and can lead to savings of up to 30% during the heat of summer.
- Air conditioning repair – There’s no need to sweat it out if your AC unit has quit working or it’s not cooling your home or business. The expert technicians at Deljo are available to provide relief 24/7.
- Ductless mini-split installation, maintenance, and repair – Ductless mini-split systems are a great way to heat and cool older homes that don’t have ductwork. They also give you the option of heating or cooling individual rooms to your comfort level. If you want a mini-split system for your home in Winnetka, or you need maintenance or repair services, Deljo can handle the job for you.
Indoor Air Quality Services in Winnetka
The quality of the air in your home plays an important role in the health of your family, and to help keep the air you’re breathing as clean as possible, Deljo Heating & Cooling can install and maintain either the Carrier Infinity Air Purifier GAPA or the REME HALO® Whole Home In-Duct Air Purifier.
Either system will greatly improve the quality of the air in your home through the elimination of pathogens and indoor pollutants.
Expert HVAC Service in Winnetka, IL: Deljo Heating & Cooling
If you’re seeking a reliable contractor that can work on your HVAC in Winnetka, Illinois, then Deljo Heating & Cooling is the company to call. We’ve been working with heating and air conditioning customers in Winnetka and the greater Chicago area for the past century.
One of the many reasons we’re one of the area’s top heating and air conditioning system companies is that we provide emergency repairs 24/7. Superior customer satisfaction is what we strive for, which is why any AC or heating repairs are addressed as soon as possible.
We want your home to stay comfortable without minimal disruptions to your schedule, so don’t delay. Give Deljo Heating & Cooling a call at 773-829-4295 or contact our customer service team online today to schedule the very best HVAC service around Chicago’s north shore.
Recent Jobs and Reviews in Winnetka, IL
Job Locations and Reviews
Jake R.
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
Sam A.
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
Jay L.
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
Gabe G.
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
Gabe G.
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
Gabe G.
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
Gabe G.
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
Charlie B.
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
Gregory Z.
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
John T.
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
Gabe G.
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
Sam A.
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
Sam A.
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
Matthew A.
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
Angel G.
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
Giovanni M.
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
