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Heat thermostat works most of the time but stops sometimes…

Customer Question
Heat thermostat works most...

Heat thermostat works most of the time but stops sometimes for long periods of time. have changed batteries.

Contractor's Assistant: Did you double-check the thermostat's settings? And what about the filters?

Yes. have tried everything

Contractor's Assistant: Do you plan on doing the work yourself?

Depends on how complicated

Submitted: 9 months ago.Category: HVAC
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Answered in 20 minutes by:
11/30/2017
HVAC Technician: airheatman, HVAC Technician replied 9 months ago
airheatman
airheatman, HVAC Technician
Category: HVAC
Satisfied Customers: 9,529
Experience: Furnace, A/C and heat pump specialist.
Verified

The first step is to determine if this is an issue with the thermostat or an issue with the furnace. To do so, Disconnect wires at thermostat and twist or connect R and W wires together and see if furnace stays on.Do this at the time it is off and should be on.

If furnace does not stay on with wires connected we will concentrate on the furnace.

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