24/7 Emergency Service Available
Frequently Asked Questions (FAQ)
We recommend two tune-ups per year — one for your heating system (fall) and one for your cooling system (spring). Regular maintenance improves efficiency, prevents breakdowns, and extends the life of your equipment.
Call us if you notice:
No heat or weak airflow
Unusual noises (bangs, rattling, squealing)
Burning smells
Rising energy bills
Short cycling (system turning on/off frequently)
Hot and cold spots in your home
Early repairs prevent bigger, costlier issues.
We service all major HVAC brands, including:
Carrier, Lennox, Trane, Goodman, Rheem, Bryant, York, American Standard, and AirQuest. We install American Standard and AirQuest brands.
This often means:
Low refrigerant
Dirty coils
Clogged air filter
Thermostat issue
Compressor or electrical problem
We can diagnose and fix the issue quickly.
Strange sounds often mean:
Loose or damaged parts
Dirty burners
Blower motor issues
Ignition problems
Shutting the system off and calling us is the safest option.
Yes — we provide fast, emergency heating & cooling service to help you stay comfortable when your system unexpectedly fails.
Providing the Foundation and More, For Your Heating and Cooling Needs
Contact Info
Cornerstone Mechanical, 712 East Lake Street, South Lyon, Michigan 48178, United States
Quick Links
Experience the difference with Cornerstone Mechanical Today.
We stay in constant communication with our customers until the job is done. To get a free quote, or if you have questions or special requests, Call or Text us 1-248-880-7865.
Special 0% financing available. Subject to credit approval. Ask for details.
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