For more than a century, Deljo Heating & Cooling has been the name Evanston homeowners trust for reliable comfort solutions. Whether you need HVAC or plumbing solutions, our team delivers expert care backed by 5-star reviews and over 100 years of experience.
If you’re experiencing an HVAC or plumbing emergency, call us or click the button at the top of the page to schedule service online. Keep reading for an overview of our Evanston HVAC and plumbing services.
Plumbing Services in Evanston
No matter the issue, you can trust Deljo for prompt, affordable, and professional plumbing services. Our team provides comprehensive plumbing repair, from small leaks to major system issues.
If your hot water suddenly runs cold, we specialize in water heater repair, restoring comfort with fast and professional service. For clogged or slow drains, our expert drain cleaning clears buildup and keeps your plumbing flowing smoothly.
Air Conditioning Services in Evanston
Summers in Evanston demand a dependable cooling system. That’s why Deljo offers expert air conditioner repair to restore your comfort quickly when your AC breaks down. From refrigerant issues to electrical malfunctions, our licensed technicians handle every kind of AC issue. We also provide seasonal air conditioning maintenance and professional air conditioning installation to keep your home comfortable all summer long.
Heating Services in Evanston
When temperatures drop, Deljo is here to keep your family warm with expert heating services. If your furnace stops working or struggles to heat evenly, call us for reliable furnace repair. Our technicians provide thorough diagnostics and long-lasting repairs so you’re never left in the cold.
We also specialize in boiler repair and professional heating installation, ensuring your system runs safely and efficiently for years to come.
Why Choose Deljo Heating & Cooling in Evanston?
There are plenty of companies you could call when something goes wrong with your plumbing or HVAC. But Evanston families have been turning to Deljo for generations. The reasons why they do this include:
- We show up when it matters most. Burst pipes and broken furnaces don’t wait for a convenient time. That’s why we’re available 24/7 for emergency HVAC and plumbing services.
- We’ve been doing this for over 100 years. Over our century of operation, we’ve seen it all. We know how to get the job done right the first time.
- Our reputation speaks for itself. We’re proud of the thousands of 5-star reviews we’ve earned. They don’t come from flashy ads. They come from neighbors who were treated fairly and had their problems solved quickly.
- We make comfort affordable. Big repairs and replacements can be stressful. That’s why we offer flexible financing options that take the sting out of an unexpected bill.
- We take care of our customers. With our Gold Star Program, customers get priority scheduling, regular maintenance, and extra perks. It’s our way of saying thank you for trusting us with your home.
At Deljo, it’s simple: we treat you the way we’d want to be treated. That’s been our approach for more than a century, and it’s why so many Evanston families keep our number handy.
Call Your Trusted Evanston Plumbing & HVAC Experts
Ready to take care of that plumbing issue or finally get your heating and cooling running the way it should? Deljo Heating & Cooling is here to help. Give us a call or request an instant quote today and see why Evanston has trusted us for over 100 years.
Recent Jobs and Reviews in Evanston, IL
Evanston, IL at a glance
Deljo Heating, Cooling & Plumbing has completed 20 jobs in Evanston, IL in September 2026.
The most recent job was on September 28, 2026.
Job Locations and Reviews
Angel G.
Completed comprehensive maintenance agreement service on residential HVAC system including one furnace and one humidifier unit. Performed thorough inspection of furnace assembly, evaporator coil, and associated components located in basement utility area. Verified proper operation of humidifier system, checked all electrical connections, inspected refrigerant lines and PVC condensate drainage, and confirmed adequate airflow through ductwork. All equipment found operating within manufacturer specifications with no immediate repairs required.
Evanston, IL 60201
Sam A.
Completed comprehensive maintenance agreement inspection on single furnace system. Performed thorough examination of blower wheel assembly, noting normal dust accumulation on impeller and age-appropriate patina on radial fins consistent with regular operation. Verified Honeywell ProSeries thermostat functionality, confirming proper heating mode operation with system actively calling for heat and fan set to auto mode. Filter media replacement not included in this service visit per agreement specifications.
Evanston, IL 60202
Sam A.
Performed preventive maintenance inspection on furnace system under maintenance agreement. During inspection, discovered significant ice buildup on evaporator coil with temperature reading of 14.2°F, indicating potential refrigerant flow restriction or airflow deficiency. Documented equipment condition including condensate management components and verified manufacturer specifications on unit labels. Captured diagnostic imagery showing extent of coil frosting and internal component configuration for maintenance records.
Evanston, IL 60201
Sam A.
Performed comprehensive maintenance on boiler and water heater systems, including combustion analysis and safety inspections. Replaced air filters with 16x20x1 and 16x25x1 units. Inspected recently installed mini split system, checking refrigerant levels, electrical connections, and overall operation. Cleaned mesh filter screen from equipment and verified proper airflow. Confirmed thermostat operation and system controls functioning within normal parameters. All equipment operating safely and efficiently upon completion.
Evanston, IL 60202
Paul M.
Completed routine HVAC maintenance agreement inspection on gas furnace system. Performed visual inspection of burner assembly, heat exchanger, control board, gas valve connections, and electrical components. Documented system condition with photographs showing proper wire connections, gas line connections, and control board operation. All components found operating within normal parameters with no deficiencies noted.
Evanston, IL 60201
Matt B.
# HVAC Cooling System Repair - Condensate Drainage Issue Responded to service call for water accumulation in basement during air conditioning operation. Upon arrival, inspected Gibson air handler unit and associated condensate drainage system. Identified improper drainage configuration in PVC condensate line assembly causing water backup. The existing piping network above the unit showed multiple connection points with potential for improper pitch or blockage. Assessed all elbows, joints, and horizontal runs for proper slope and drainage flow. Cleared condensate line blockage and verified proper drainage function. Tested system operation by running cooling cycle and monitoring condensate flow through drain lines. Confirmed water was evacuating properly through drainage system without backup or overflow into basement area. Verified thermostat operation showing system in off mode with indoor temperature reading 69°F. Checked electrical connections, including grounding and power supp
Evanston, IL 60201
John T.
Conducted on-site assessment of boiler system experiencing active leak in mechanical room. Documented existing equipment configuration including pressure tank, piping connections, and control components. Provided estimate for necessary repairs to address leak and restore system to proper operating condition.
Evanston, IL 60202
Gregory Z.
Completed comprehensive maintenance agreement service on GS steam boiler system. Inspected and documented boiler piping infrastructure, including brass valves, galvanized supply lines, and associated mechanical components in utility space. Verified thermostat operation and programming functionality, confirming proper temperature control settings and system communication with heating equipment.
Evanston, IL 60201
Izzy G.
Completed comprehensive maintenance inspection on CC 1 boiler system under agreement terms. Documented system condition through photographs, revealing significant rust accumulation on ventilation ductwork connections, condensation throughout duct assembly indicating potential temperature differential issues, and visible corrosion on heating element terminals and connectors. Inspected internal heating components including terminal strips with brass connectors showing oxidation and dust buildup, examined insulation condition noting deterioration and contamination, and assessed overall system integrity for continued safe operation.
Evanston, IL 60202
Angel G.
Completed comprehensive maintenance on furnace and humidifier system as part of annual service agreement. Performed thorough inspection of all internal components, including control board, wiring connections, and exhaust venting system. Removed and cleaned flame sensor rod to ensure proper ignition and safe operation. Verified PVC exhaust and intake piping connections are secure with proper sealing at all coupling points. Inspected blower motor assembly and confirmed electrical connections throughout the unit are tight and functioning correctly.
Evanston, IL 60201
Matt B.
Completed comprehensive preventive maintenance agreement inspection on residential HVAC system including one furnace unit, one humidifier assembly, and outdoor condensing unit. Inspected humidifier basin and electronic control panel, verified proper operation of LED indicator and control functions. Evaluated outdoor condenser unit mounted on rooftop platform with proper elevation supports, confirmed secure installation and verified unit accessibility for service. All equipment found operating within normal parameters and documentation captured for service records.
Evanston, IL 60202
Sam A.
Completed comprehensive maintenance agreement inspection covering one boiler, one furnace, and one air conditioning unit. Inspected crawlspace mechanical components including copper refrigerant lines, PVC drainage systems, and ductwork, noting age-related oxidation on metal components but all systems operating within normal parameters. Examined condensate drain pan showing wear and coating deterioration; documented condition with photographs for maintenance records. All equipment tested and found operational with no immediate service requirements identified during this preventive maintenance visit.
Evanston, IL 60202
Giovanni M.
Completed comprehensive maintenance agreement service on dual HVAC system consisting of two condensers, two furnaces, and one water heater. Replaced temperature sensor component with new unit featuring white cylindrical body and metallic threaded base with wire connector. Installed 16x25x1 filter and serviced Applaire model WCD3511 equipment, documenting all work with photographs for service records.
Evanston, IL 60201
Izzy G.
Responded to no cooling call on commercial rear unit. Upon arrival, performed diagnostic testing with clamp meter and found thermostat malfunction preventing proper system operation. Replaced faulty thermostat and verified proper electrical readings and system function. Unit tested and confirmed cooling properly upon departure.
Evanston, IL 60201
Gabe G.
Completed comprehensive HVAC maintenance agreement inspection on residential split system, including indoor furnace unit and outdoor condensing unit. Performed thorough visual inspection of furnace interior components, including blower assembly, control board, pressure switches, electrical connections, and wiring harnesses, confirming all components operational and properly secured. Inspected outdoor condenser unit, verified proper placement on concrete pad, checked clearances from surrounding landscaping, and confirmed unit accessibility for service.
Evanston, IL 60202
Izzy G.
Responded to service call for NTI tankless water heater experiencing consistent water pressure loss. Upon inspection of the mechanical room installation, evaluated the complete plumbing system including copper supply lines, manifold configuration, and associated shut-off valves. Examined the tankless unit's digital control interface and verified operational parameters. Inspected all pipe connections, fittings, and isolation valves throughout the system for potential pressure restrictions or flow impediments. Assessed the condition of aging copper piping showing corrosion and mineral deposits that could contribute to pressure reduction. Checked valve operation and flow characteristics at multiple points in the distribution system. Documented existing conditions with photographic evidence showing the complete mechanical installation and specific areas of concern. Identified potential causes of pressure loss including sediment buildup, valve restrictions, or internal heat exchanger scalin
Evanston, IL 60201
Angel G.
Completed comprehensive maintenance agreement service on air conditioning system, air handler, and humidifier unit #35. Performed thorough inspection and cleaning of heavily soiled evaporator coils which exhibited significant dust and debris accumulation across both coil sections. Took temperature and operational readings using digital instrumentation to verify system performance. Cleaned and inspected dirty mesh filter element removed from system. Service excluded media filter and electronic air cleaner per agreement specifications.
Evanston, IL 60202
Giovanni M.
Completed comprehensive maintenance agreement service on air conditioning system, furnace, and humidifier. Performed system diagnostics with temperature readings showing 72.9°F at equipment access panel. Installed 20x25x1 filter and conducted standard safety and operational checks on all HVAC components to ensure proper system performance.
Evanston, IL 60203
Sam A.
Completed comprehensive maintenance agreement service on multi-zone HVAC system including two air conditioning units, two mini-split heads, and one furnace. Performed thorough inspection and cleaning of all equipment, verified proper operation of electrical components and refrigerant lines, and documented system conditions with photographic evidence. REME HALO air purification bulb identified as due for replacement and customer notified for scheduling.
Evanston, IL 60201
Gabe G.
Completed annual maintenance tune-up on 5-year-old boiler system. Performed comprehensive inspection of heating equipment, ductwork connections, and associated components. All systems inspected and found operational, with documentation photos taken of ductwork installation and mechanical connections showing normal wear consistent with unit age.
Evanston, IL 60202
