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Thermostat Blank or Not Working
Blank or unresponsive thermostat with a furnace or AC. Simple checks and repair costs.
Safe things to check
- Replace the thermostat batteries if your model uses them.
- Make sure the furnace door or panel is closed.
Stop here
Do not rewire a thermostat or remove the furnace panel to check fuses or boards. The furnace has line voltage inside.
What a technician checks
A technician checks the low-voltage wiring, the control board, and safety switches that cut power to the thermostat.
Typical cost
Angi: thermostat repair $100 to $300; replacement or a smart thermostat upgrade can run up to about $600. (Source: Angi) National figures; not a quote.
Refrigerate LLC in Lindon has HVAC-certified technicians and reviews every request. Prefer to talk? Call or text (801) 899-2171.
FAQ
Can I fix this myself?
Only the simple checks listed above. Gas, refrigerant and electrical work needs a trained HVAC technician.
Can this site tell me what is wrong with my furnace or AC?
No. Utah HVAC Help is general information, not a diagnosis. Gas, refrigerant and high-voltage electrical parts need a trained HVAC technician. If you smell gas or a CO alarm sounds, leave the building and call 911 and your gas company from outside.
Sources
Last checked October 27, 2026. Prices and rules change; confirm with the source before you rely on them.