Question about Honeywell Programmable Thermostat Heater

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Fan will not cut off

Home thermostat fan will not cut off

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Janet, the problem most likely is not in the thermostat. It is probably the fan relay on the circuit board in the furnace. Some furnaces have an individual fan control board, some furnaces have all the controls integrated within one control board. If your furnace is 20 years old or older, it could be the fan/limit control because at that time all furnaces did not come with a control board. If it is much older than 20 years, it is much more likely a stuck fan/limit.

Posted on Apr 13, 2015

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