Heat Pumps and Electric Heating - No 24volt power
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bighomie
07-05-09, 08:38 AM
I recently tried to change my thermastat and I think I shorted out something. There is no fuse in the air handler. The unit is a tempstar heat pump installed in 1992. It is an all electric split system. Anyone have the answer to bring the 24 volt power back?
goldstar
07-05-09, 12:06 PM
First, you must find the transformer. You should have 24 vac on the secondary and 110 -120vac on the primary side. If the house voltage side is okay, you can try turning off the furnace breaker for a few minutes and then turn it back. Transformer may reset, but many have a one shot thermistor and you will then need a new transformer.
dac122
07-06-09, 06:13 AM
Replace your 110 to 24VAC transformer. It is cube shaped and not far down the primary power circuit of your air handler.