Have HVAC Questions? Ask an HVAC Expert for Answers
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Does your thermostat control a regular furnace?
Ok is the thermostat a separate wall one?
OK there should be a low voltage fuse on the board in the Heating unit. Often they put a 3-5 amp slot fuse right on the control board in the heating unit. There also could be an inline one, but you should check for that first as if it is blown that will make both thermostats dead.
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