Question about Honeywell Programmable Thermostat Heater

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HEATER DOES NOT TURN ON BUT AC WORKS.

HEATER PROBLEM

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- If no voltage output at the thermostat for the supply of heater/reversing valve, then replacement of thermostat is needed (but check the thermostat setting).
- If the voltage output at the thermostat for the supply of heater/reversing valve is present, then then check for heater/reversing valve fuse or overheat protection, and check for defective heater/reversing valve

Posted on Jan 03, 2008

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Posted on Jan 02, 2017

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