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.
Backup power
Standby Generator Service
A standby generator needs to start, transfer and carry its intended load when utility power is unavailable. Routine checks help reveal battery, fuel, control and maintenance concerns early.
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.
Residential standby-generator inspection and service, with scope confirmed around the make, model and installation.
01
Existing generator condition assessment
02
Battery, controller and startup checks
03
Routine maintenance for supported equipment
04
Repair guidance and next-step planning
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 standby generator service.
Every home and system is different. These answers help you prepare; an on-site diagnosis confirms the right next step.
Ask another questionDoes McHenry Heating & Air service generators?
The current company website lists generators among the equipment its technicians service. Call with the make and model so the office can confirm the specific scope.
How often should a standby generator be checked?
Follow the manufacturer’s maintenance schedule and address missed exercise cycles or warnings promptly.
Is generator service part of 24/7 HVAC emergency coverage?
Do not assume that. Call the office to confirm generator-service availability and treat electrical or fuel hazards as an emergency through the appropriate utility or emergency service.
Verified Google reviews
What local homeowners say about standby generator service
4.9from 637 Google reviews
Twenty real, non-repeating Google reviews selected for this general/customer service slider.
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
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