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 between June 2026 and July 2026.
The most recent job was on July 10, 2026.
Job Locations and Reviews
Completed full HVAC system replacement including outdoor condensing unit, Unico air handler, and evaporator coil. Installed new air handler in attic space with proper mounting and leveling on existing floor joists. Connected multiple insulated flex duct runs to air handler for distribution throughout the home. Established condensate drain line with PVC piping and verified proper drainage. Completed all electrical connections including power supply and control wiring between components. Verified system operation with digital thermometer readings showing proper air temperature at 71.9°F. All equipment secured, labeled, and tested for optimal performance.
# Magic-Pak HVAC System Replacement Successfully completed a full Magic-Pak HVAC system replacement in a residential mechanical closet. The two-technician crew removed the existing unit and installed a new Magic-Pak all-in-one heating and cooling system over approximately three-quarters of a workday. ## Work Performed Removed the existing Magic-Pak unit from the dedicated utility closet space. Disconnected all electrical connections, refrigerant lines, and condensate drainage components following proper recovery procedures. Prepared the installation area by ensuring adequate clearances and verifying structural support for the new equipment. Installed the new Magic-Pak system, which features an integrated air handler and evaporator coil configuration housed in a compact vertical cabinet. Mounted the unit securely within the existing closet space, maintaining proper clearances for serviceability and airflow. Connected the electrical supply to the unit's control panel, which includes
Installed surge protector at electrical panel to protect HVAC equipment from voltage spikes and power surges. Replaced existing electrical whip with new flexible conduit and wiring connecting outdoor AC unit to disconnect box, ensuring proper gauge wire and secure connections per manufacturer specifications and local electrical code requirements.
Completed cooling check on three air conditioning systems as part of seasonal maintenance agreement. Performed comprehensive inspection of indoor air handler components including blower assembly, evaporator coil, and refrigerant lines. All systems operational with temperature readings within normal parameters.
Completed HVAC maintenance agreement service on condenser unit with 20x25x1 filter replacement. Finalized repairs from previous service visit that were carried over, documenting temperature readings of 486°F and inspecting condensate drainage system with visible frost accumulation on drip pan and PVC drain lines. All maintenance tasks completed and photographed for record.
Completed comprehensive plumbing repairs including installation of stainless steel braided laundry hoses, replacement of toilet fill valve and supply line, installation of premium thermostatic shower valve, replacement of single faucet cartridge, and water service shutoff at meter/buffalo box. All fixtures tested and verified operational upon completion.
Completed comprehensive maintenance agreement service on split system HVAC equipment. Performed electrical diagnostics at outdoor condensing unit, verifying proper voltage and amperage at disconnect box. Accessed indoor air handler unit in attic space and tested capacitor performance, recording capacitance reading of 32.14 microfarads to ensure component is operating within manufacturer specifications. All electrical connections inspected and found secure with no signs of overheating or deterioration. System operational and performing to standards upon completion of maintenance inspection.
Responded to no cooling complaint and discovered evaporator coil completely frozen over with heavy ice accumulation on heat exchanger and refrigerant lines. Diagnosed frozen coil condition caused by restricted airflow or possible refrigerant issue. System was shut down to allow ice to thaw before further diagnostics could be performed to determine root cause and complete necessary repairs.
Completed preventive maintenance inspection on five-year-old air conditioning system with no reported issues or symptoms. Performed comprehensive system evaluation including supply air temperature measurements at ductwork (128.1°F recorded), visual inspection of blower motor assembly and electrical connections, and verification of refrigerant lines and internal components. All equipment operating within normal parameters with no deficiencies noted.
Responded to no cooling complaint on 9-year-old Carrier air conditioning system. Upon arrival, found red indicator light on Honeywell thermostat and confirmed unit running but no cool air delivery. Performed system diagnostics and identified failed dual run capacitor with severe corrosion and rust on terminals. Measured supply air temperature at 53.8°F, confirming inadequate cooling performance. Replaced defective capacitor with new TITAN TRCFD455 dual run capacitor, restored proper system operation, and verified cooling performance. System now operating within normal parameters with proper airflow and temperature differential.
Responded to no cooling call and discovered active refrigerant leak from severely corroded evaporator coil. The serpentine copper coil exhibited extensive rust throughout its length, particularly at bends and joints, indicating advanced oxidation and system age. Inspected condensate drain system and confirmed proper trap configuration with functioning condensate pump. Unit requires evaporator coil replacement to restore cooling capacity and system integrity.
Responded to no cooling complaint on main floor air conditioning unit. Upon arrival, performed diagnostic inspection of outdoor condenser unit and associated electrical components. Unit appeared operational with no obvious mechanical failures observed during visual inspection. Documented equipment condition including exterior disconnect box and unit placement for service records.
Evaluated an 11-year-old Magikpak HVAC system (Model HWC8R4809P18A1A) that was not cooling properly due to a severely plugged condenser coil and deteriorated electrical components. Documented the unit's condition and provided a comprehensive estimate for full system replacement given the age of the equipment and extent of necessary repairs.
Completed spring cooling tune-up on dual-zone HVAC system consisting of two air handlers and two outdoor condensing units. Performed comprehensive maintenance including filter replacements with 16x20x1 and 16x25x1 filters, verified thermostat operation displaying proper temperature readings, and inspected attic-mounted air handler with associated ductwork and condensate drainage systems. All equipment operating within normal parameters upon completion of preventative maintenance service.
Returned to complete chemical coil cleaning from the interior side of the evaporator coil and performed comprehensive AC electrical package service. Inspected and tested all electrical components including the capacitor, contactor, and associated wiring connections, ensuring proper voltage and amperage readings throughout the system.
Conducted site assessment for full HVAC system replacement on aging equipment over 10 years old. Documented existing system configuration including air handler, ductwork connections, and associated mechanical components. Measured supply plenum dimensions and photographed current installation setup to determine proper equipment sizing and clearance requirements for new system installation. Previous day's repair work completed, but homeowner requesting comprehensive replacement quote due to system age and condition. Evaluated accessibility, existing infrastructure, and mounting platforms to prepare accurate estimate for complete system changeout.
Responded to no cooling call on system less than one year old. Upon arrival, determined that safety float switch in drain pan had tripped due to condensate backup, shutting down the unit as designed. Cleared condensate line blockage, verified proper drainage, and reset float switch. Tested system operation and confirmed unit cooling properly with normal airflow and temperature split.
Replaced existing 40-gallon Bradford White tanked water heater in residential mechanical room. Installation included connecting copper supply lines with brass fittings, installing blue expansion tank on the hot water outlet, and reconnecting gas supply line to the unit. All plumbing connections were properly secured and tested for leaks to ensure system integrity and safe operation.
Responded to callback regarding low water pressure alerts occurring over the past week. Inspected plumbing installation in basement mechanical room, including copper supply lines, brass compression fittings, and electronic pressure monitoring device mounted on concrete block wall. Evaluated system connections, valve operations, and pressure regulation components to identify source of PSI drops. Verified all brass fittings and joints were properly secured and checked for potential leaks or air infiltration that could affect pressure readings. Tested pressure monitoring device functionality and confirmed system integrity to ensure no immediate risk of system failure or water damage.
Responded to installation callback regarding condensate pump discharge line. Customer reported that original installation tied into existing water supply line to sink rather than running new dedicated drain line. Documented current installation configuration with photos showing HVAC equipment location and existing plumbing connections in utility area for further evaluation and corrective action planning.
