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BillyHvac, Journeyman HVAC Tech
Category: HVAC
Satisfied Customers: 22679
Experience:  Endorsed for unlimited heating, cooling, oil burners, boilers, refrigeration, hydronics
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I have a Honeywell thm532OR thermostat. It's showing a

Customer Question

I have a Honeywell thm532OR thermostat. It's showing a flashing "no signal" in the upper left hand corner. The unit on the furnace has no lights on... Can't get it to turn on the A/C? Any suggestions?

The main unit is not showing any power - no lights on it. I've reset all the breakers and all electric in the house is working

Submitted: 2 years ago.
Category: HVAC
Expert:  BillyHvac replied 2 years ago.

Have you checked power at the furnace with a meter?
Is the door safety switch depressed fully?

Use reply button please