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 April 2026.
The most recent job was on April 15, 2026.
Job Locations and Reviews
Angel G.
Completed comprehensive tune-up and inspection on residential air conditioning system. Performed standard maintenance procedures including inspection of indoor evaporator coil assembly, verified proper refrigerant line insulation, checked electrical connections and components at service panel and disconnect box, and confirmed all system components were operating within normal parameters. Unit found to be in good working condition with no immediate repairs required.
Evanston, IL 60202
Angel G.
Completed HVAC maintenance agreement service call. Changed out 20x25x1 air filter as part of routine maintenance visit. Verified thermostat operation showing current temperature reading of 73°F with display functioning properly. Inspected outdoor condensing unit location and surrounding area. System operating within normal parameters at time of service.
Evanston, IL 60202
Angel G.
Completed preventive maintenance agreement inspection on residential HVAC system including indoor furnace unit and outdoor condenser compressor. Performed visual assessment of equipment condition, refrigerant line connections, electrical components, and mounting platforms. Documented current system status with photos showing operational equipment, copper line configurations, and installation environment for maintenance records.
Evanston, IL 60202
Giovanni M.
Completed comprehensive air conditioning maintenance and system inspection as part of customer agreement. Verified electrical readings using digital multimeter, confirming proper voltage and amperage levels at outdoor unit. Inspected condensate drain system and positioned drain pan beneath water heater connections to protect against potential leaks.
Evanston, IL 60202
Ernesto G.
Completed comprehensive cooling check, air conditioning general service, and maintenance agreement inspection on Lennox HVAC system. Performed thorough system evaluation including visual inspection of furnace unit, ductwork connections, and associated components in mechanical room. Inspected and replaced air filters, noting significant dust accumulation on existing filter media. Verified proper operation of heating and cooling equipment, checked refrigerant levels, tested airflow, and ensured all safety controls functioning correctly. Documented equipment condition with photographs showing furnace, water heater, and utility room configuration. All system components operating within normal parameters upon completion of scheduled maintenance service.
Evanston, IL 60201
Jay L.
Completed comprehensive second opinion inspection and maintenance evaluation of Heil forced-air furnace system. Performed thorough assessment of furnace unit, including examination of main access panel, burner assembly, and heat exchanger components. Inspected Aprilaire whole-home humidifier installation and verified proper operation, water supply connections, and electrical wiring. Evaluated HVAC ductwork connections and confirmed proper integration with humidification system. All system components found to be properly installed and functioning within manufacturer specifications.
Evanston, IL 60201
Angel G.
Completed comprehensive cooling check on air conditioning system and air handler general service in attic installation. Performed thorough inspection of suspended air handler unit, verified proper chain mounting and structural support from ceiling joists, and documented all manufacturer labels and AHRI certification stickers. Inspected electrical components including relay switch with red wiring, confirmed proper connections and functionality. Verified PVC condensate drain line installation and routing. System found operating within normal parameters with all safety devices and controls functioning properly.
Evanston, IL 60201
Jorge D.
Installed new 50-gallon tanked water heater with expansion tank at residential property. Properly configured exterior PVC venting system along foundation, securing all pipes to building exterior with appropriate mounting hardware and ensuring proper clearances per manufacturer specifications and local code requirements.
Evanston, IL 60202
Drew W.
Completed comprehensive cooling maintenance on residential air conditioning system and air handler unit. Performed standard preventive maintenance procedures including system inspection, temperature differential measurements using calibrated digital instrumentation, and visual assessment of ductwork components. Verified proper airflow through supply and return air pathways. Noted that 20x24x5 filter media is not included in maintenance agreement and remains customer responsibility. Conducted exterior condenser unit evaluation, confirmed proper operation of outdoor unit components, and documented system conditions through photographic records. All equipment operating within normal parameters at time of service completion.
Evanston, IL 60201
Charlie B.
Responded to emergency service call for leaking 20-year-old A.O. Smith tanked water heater located in basement utility area. Upon arrival, conducted visual inspection of unit and surrounding plumbing connections, documenting existing conditions with photographs. Assessed water heater showing signs of age-related deterioration, multiple pipe connections including copper supply lines, PVC venting, pressure relief valve with discharge piping, and various shut-off valves. Unit displayed manufacturer specifications and energy compliance labels on exterior tank body with characteristic green crown assembly.
Evanston, IL 60202
Charlie B.
Completed courtesy check on two air conditioning systems per maintenance agreement. Inspected air filtration system with pleated media filter in clean condition, verified proper installation in black metal housing. Examined outdoor condensing unit electrical components including capacitor with proper wire connections, contactor relay, and associated wiring. All components found to be functional and properly installed. Customer declined media filter replacement at this time.
Evanston, IL 60201
Giovanni M.
Completed maintenance inspection on CC 1 condenser unit as part of agreement service. Upon inspection, discovered significant frost and ice buildup on supply ductwork indicating potential airflow restriction or refrigerant system issue. Measured temperatures at affected duct sections using digital thermometer to document conditions. Inspected basement mechanical room housing heating unit, air handler, and associated HVAC components. Photographed frost accumulation on metallic ductwork and overall system layout for service records. System requires further evaluation to determine root cause of icing condition, which may include checking refrigerant charge levels, verifying proper airflow through evaporator coil, inspecting for blocked filters or restricted return air, and testing metering device operation.
Evanston, IL 60201
Giovanni M.
Completed comprehensive maintenance agreement service on two condenser units. Inspected electrical components including capacitor and wiring connections, verifying all connections were secure and properly terminated with wire nuts. Examined attic ductwork system with reflective insulation and confirmed proper installation and routing of electrical wiring throughout the system. All equipment found to be operating within normal parameters with components showing typical age-related wear but functioning correctly.
Evanston, IL 60202
Angel G.
Completed comprehensive cooling maintenance inspection on single air conditioning system per maintenance agreement terms. Accessed blower assembly and verified proper motor operation, electrical connections, and component integrity. Inspected interior ductwork and plenum area, confirming structural condition and insulation placement. All electrical wiring connections at blower motor found secure with proper color coding intact. Capacitor and motor assembly operating within normal parameters. System components showed typical dust accumulation for equipment in service. No immediate repairs required at time of inspection.
Evanston, IL 60201
Angel G.
Completed comprehensive maintenance agreement service on three furnace units and two humidifier systems. Performed thorough inspection of all internal components including blower motors, heat exchangers, electrical connections, and condensate drainage systems. Verified proper operation of all equipment, checked wiring harnesses and connections, inspected PVC venting and drainage lines, and confirmed humidifier units were functioning correctly with proper water flow and distribution.
Evanston, IL 60202
Izzy G.
Completed comprehensive maintenance agreement service on two air conditioning systems. Performed cooling check on both units, inspecting internal components including capacitors, compressors, and electrical connections. Verified proper operation with temperature readings confirming adequate cooling performance at 44.9°F. Removed access panels for thorough inspection, checked all wiring connections, and ensured units were operating within manufacturer specifications. Both systems found to be functioning properly with no immediate repairs needed.
Evanston, IL 60202
Matt B.
Responded to reported faint gas smell from furnace. Performed comprehensive gas leak detection using calibrated electronic detector throughout unit and associated gas piping connections. Inspected all gas line fittings, including compression coupling on supply line and connections at furnace manifold. No active gas leaks detected during testing. Verified proper operation of all safety controls and documented findings with photographic evidence. Unit operating within normal parameters at time of inspection.
Evanston, IL 60202
Donny G.
Installed a whole home water filtration system and Moen whole home water shut-off monitoring system in the basement utility area. The installation included integration with existing copper supply lines, proper valve placement with shut-off controls, and connection of the monitoring system components. All plumbing connections were secured with appropriate fittings, and the system was tested to ensure proper operation and leak-free performance.
Evanston, IL 60202
Giovanni M.
Completed comprehensive maintenance on furnace and humidifier system per maintenance agreement #10. Inspected and tested all operational components including control board with LED diagnostic indicators, electrical connections, and safety systems. Replaced defective ignitor sensor component that was preventing proper system operation. Verified all wire connections, checked system controls, and confirmed proper furnace cycling and humidifier function. System restored to full operational status with all safety checks passed.
Evanston, IL 60202
Donny G.
Responded to service call for clogged bathroom sink in residence with century-old plumbing infrastructure. Upon arrival, conducted comprehensive inspection of plumbing system including basement mechanical area and bathroom fixtures. Documented existing conditions of aged piping system, noting combination of original dark metal pipes and newer PVC installations with multiple connection points and shutoff valves. In bathroom area, observed significant mineral deposit accumulation on tub spout and fixtures, indicating hard water conditions throughout the property. Assessed condition of bathroom plumbing connections and drainage system. Photographed plumbing infrastructure and fixture conditions for service records. Recommended addressing mineral buildup on fixtures and potential preventative maintenance given age of plumbing system to prevent future drainage issues.
Evanston, IL 60201
