Trusted Furnace Repair in Chicago, IL

• licensed insured
• 20+ years
• 1-year parts & labor warranty
• NATE-Certified Technicians
• 2-hour emergency response

1. 1

   Call us any hour of the day or night — our furnace emergency line dispatches a licensed heating technician within 2–4 hours, 365 days a year, because a heating failure in winter is never a 9-to-5 problem.

2. 2

   The technician inspects the igniter, flame sensor, heat exchanger, pressure switches, and gas valve using combustion analysis tools to pinpoint the root cause — not just mask the symptom.

3. 3

   Most furnace repairs are completed on the first visit with parts from our stocked truck; we also perform a CO safety check and leave you with a written inspection report for your records.

Chicago's brutal winters make furnace reliability a matter of safety, not just comfort — windchill temperatures regularly drop below -20°F, and older homes with aging heating systems face the highest risk of mid-winter breakdowns when every HVAC company has a full queue.

Chicago furnace repair is the core of Summit Climate Solutions' Chicago operations, and for good reason. When polar vortex events drive windchill temperatures below -20°F, a furnace failure in a Naperville, Schaumburg, or Evanston home is not an inconvenience — it's a rapidly escalating safety emergency. Interior temperatures in poorly insulated homes can drop 10°F per hour when outdoor temperatures are that extreme, and families with elderly residents, infants, or medical conditions face genuine risk within hours of a heating system failure. The Chicago housing stock creates a particularly diverse repair landscape. Evanston and the older North Shore communities have significant concentrations of Victorian and early 20th-century homes that originally used steam radiator or hot-water boiler heating, many of which were converted to forced-air furnace systems in the 1970s and 1980s. These converted systems often have ductwork compromises — inadequate return air capacity, undersized supply runs to upstairs bedrooms — that cause the furnace to overheat and trip its high-limit switch. Summit technicians in the Evanston market are experienced with the thermal and airflow peculiarities of converted older homes and approach high-limit trip diagnoses with attention to ductwork static pressure, not just the furnace components themselves. Naperville and Schaumburg, dominated by 1980s–2000s construction, have a different failure profile. These homes were built during the era when 80% AFUE furnaces were standard, and those systems are now reaching the 25–35 year mark where heat exchanger cracks, inducer motor failures, and control board failures accelerate. Summit technicians perform camera-assisted heat exchanger inspections on any Chicago-area furnace that has been in service more than 15 years, because the extreme thermal cycling of Chicago winters accelerates heat exchanger fatigue at a rate that exceeds more moderate climates. Frozen condensate drain lines are a Chicago-specific failure mode that Summit is well equipped to diagnose and resolve. High-efficiency 96% AFUE condensing furnaces produce significant condensate, and drain lines that run through unconditioned spaces — crawl spaces, uninsulated garages, exterior walls — can freeze solid during extended sub-zero periods. Summit technicians carry heat tape and condensate drain remediation supplies as standard winter truck inventory, and the response to a "furnace shuts off after running for 30 minutes" call in January always includes a condensate drain inspection before assuming a component failure.

Gas furnace repair is not a service category where technician quality is interchangeable. Work done incorrectly on a gas appliance — incorrect gas pressure, improper heat exchanger diagnosis, incorrect flue pipe reassembly — can create carbon monoxide hazards that injure or kill families. Summit Climate Solutions requires NATE certification on all furnace technicians, maintains current licensing in every state we operate in, carries gas work endorsements where required, and includes a free carbon monoxide safety check on every furnace visit — not because it's required, but because it's the right thing to do. Our 20-year track record across six major metros represents thousands of gas appliance repairs performed safely and documented thoroughly. We earn trust by doing the work right, every time.

”

Every furnace repair includes a complimentary carbon monoxide safety check with a calibrated detector — because a cracked heat exchanger can endanger your family even after the heat comes back on.