Our 17-year-old furnace died on a very cold holiday weekend! 😭 Jeff was SO KIND and came out twice on Saturday. We ended up needing a new furnace and he got it all arranged and let us borrow a space heater. Russ and Neil were great and installed it on Monday. Cassie got the permit with the city and the whole process was smooth and easy. Communication was fantastic. They were even nice to our crazy dogs. So grateful to have a warm house again! We trust McHenry Heating 100%! Thank you!
Home comfort, handled
Furnace Repair & Installation
Safe combustion and dependable airflow matter as much as the thermostat setting. The whole system should be evaluated together.
24/7 emergency HVAC Licensed, bonded & insured
4.9Google rating
637 reviews
637 reviews
Since 1999Family owned & local
NATE techniciansExperienced diagnosis
BBB A+Accredited business
24/7 HVACEmergency availability
What we handle
Service built around the cause—not just the symptom.
Complete gas furnace service, from no-heat diagnosis to right-sized replacement.
01
Ignition and control repair
02
Combustion and safety evaluation
03
Blower and airflow diagnosis
04
High-efficiency furnace replacement
The McHenry method
Diagnose carefully. Explain clearly. Verify completely.
01
Measure before recommendingPerformance, safety and system conditions establish what is actually happening.
02
Make the tradeoffs visibleWhen more than one path makes sense, you should understand the cost, life and comfort implications.
03
Test the completed workThe repair or installation is checked in operation, then reviewed with the homeowner.
Straight answers
Common questions about furnace repair & installation.
Every home and system is different. These answers help you prepare; an on-site diagnosis confirms the right next step.
Ask another questionWhy is my furnace blowing cool air?
Thermostat settings, ignition trouble, overheating limits and airflow problems are common possibilities. Diagnosis should come before replacing parts.
When should a furnace be replaced?
Consider age, heat-exchanger condition, repair history, comfort and operating cost together rather than using age alone.
Do you test a new furnace after installation?
A professional startup should verify controls, airflow, temperature rise and safe operation before handoff.
Verified Google reviews
What local homeowners say about furnace repair & installation
4.9from 637 Google reviews
Twenty real, non-repeating Google reviews selected for this heating/furnace/boiler slider.
My furnace went out and they came the next day. I had to replace it and they gave me a good price and installed the next day during the ice storm. They were kind enough to let me borrow a generator and a heater for the night so my pipes wouldn't freeze. They went the extra step for me. I would definitely recommend them!
I have been a customer for almost 10 years now and there is no other company I would trust with my Heating/Cooling/Water heater needs. Over the years I have purchased a Water Heater, new Furnace, and new air conditioner, never an issue. The team is professional, courteous, knowledgeable, and just really easy to work with. I have always had a service plan on my system and one of the great things is the longevity of the staff. I have had Tony as my service tech now for i would say 3 years in a row. There is something comforting about always seeing the same person year after year knowing that they not only know your system but they know you. Thanks Mchenry Heating and Thanks Tony
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