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
Boiler Repair & Installation
Boiler systems reward careful diagnosis. Water flow, controls, venting and heat distribution all shape how the system performs.
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.
Hydronic boiler service for steady, safe heat in McHenry and Lake County homes.
01
No-heat and circulation diagnosis
02
Zone and control repair
03
Leak and pressure evaluation
04
Boiler replacement and startup
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 boiler repair & installation.
Every home and system is different. These answers help you prepare; an on-site diagnosis confirms the right next step.
Ask another questionDo you service older boiler systems?
Yes. A technician can evaluate the equipment, controls and distribution system and explain which repairs remain practical.
Why are only some zones cold?
Air, valves, circulators, controls or flow balancing may be involved. Testing isolates the cause.
Can a boiler also make domestic hot water?
Some systems do. The exact service approach depends on whether the home has an indirect tank, combi boiler or separate water heater.
Verified Google reviews
What local homeowners say about boiler 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
01 / 20
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