Excellent experience from start to finish. James was very informative during the quote process and provided multiple options. Cole and Jay showed up on time and got right to work. They were courteous and did excellent work. Everything was tested and cleaned up before they left. I highly recommend using McHenry Heating and Air.
24/7 emergency HVAC response
Comfort restored.
Day or night.
Heating, cooling, plumbing and indoor air quality service across McHenry and Lake Counties.
Licensed, bonded & insured Family owned since 1999
Need help now?HVAC response, 24/7
Whole-home service
One number for the systems that keep home running.
When heating, cooling, plumbing and air quality are handled together, the recommendation can account for the whole house—not just the equipment in front of the technician.
01020304
Cooling
AC repair, replacement and maintenance for steady summer comfort.
Explore coolingHeating
Furnace, boiler and heat-pump service built for northern Illinois winters.
Explore heatingPlumbing
Leaks, water heaters, drains, sewer cameras, pumps and fixtures.
Explore plumbingAir Quality
Filtration, humidity and air-treatment options selected as a system.
Explore air quality
1999Family owned
in McHenry
in McHenry
Local by design
Experience that shows up in the details.
McHenry Heating & Air has served local families since 1999. The company has grown, but the standard remains personal: understand the problem, explain the options and respect the home.
Qualified for the workNATE technicians, EPA refrigerant certification and NCI air-balancing credentials.
Repair before rhetoricDiagnosis and understandable options come before a major equipment decision.
Respect for the homeOrganized work areas, clear communication and a complete handoff.
Maintenance membership
Keep comfort predictable.
Regular heating and cooling care, planned before the peak season, helps surface wear early and keeps equipment history in one place.
What to expect
A clear service visit from first call to final check.
- 01
Tell us what changed
Call or request service online. Share the symptoms, timing and anything you have already checked.
- 02
Get a clear diagnosis
A trained professional inspects the system, explains the cause and lays out practical options.
- 03
Approve the right fix
Work starts only after the recommended scope and next steps make sense to you.
- 04
Know what happens next
Before leaving, the technician reviews operation, care and any future items worth planning.
Repair or replace?
Make the next decision with the whole picture.
A system’s age matters, but so do the failure, repair history, operating cost, comfort and the home around it. Start with a diagnosis, then compare real options.
Schedule an assessmentFlexible options
Financing for qualified customers
Review current plans and terms before committing to a larger comfort or plumbing project.
Explore financingSeasonal savings
Current service offers
See the latest available promotions and confirm eligibility when scheduling.
View offersVerified Google reviews
Trusted in homes across two counties
4.9from 637 Google reviews
Real feedback from local homeowners who called McHenry Heating & Air.
My experience with the service tech and the installation team (needed to replace a 26 year old Trane) were top notch. This was my first time dealing with McHenry HVAC but they are my go to dealer now. Fair pricing and as it turned out next day installation.
Absolutely the best this is the second time we have used them and their price was fair and Chris did an excellent job getting our heat working on the coldest day of the year thanks McHenry Heating and cooling
01 / 20
Local service area
Built around the homes of McHenry and Lake Counties.
From older hydronic homes near historic town centers to newer subdivisions with zoned forced air, local housing varies. Our service-area pages connect that context to the comfort and plumbing needs most likely to matter.
McHenryCounty
LakeCounty
Ready when you are
Let’s get the right person headed your way.
Share what changed and how urgent it feels. For an HVAC emergency, call directly for the fastest response.
Call 24/7 for HVAC emergencies(815) 444-9900Office hoursMonday–Friday, 8am–4pm