Blower Motor Runs Constantly. - HVAC - DIY Chatroom Home Improvement Forum

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Old 05-31-2012, 09:29 AM   #1
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Blower motor runs constantly.

Hi, I have an American Standard Freedom 80 series furnace. The blower motor stays on constantly even when the thermostat is turned off. Any suggestions as to the problem would be welcome.


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Old 05-31-2012, 09:37 AM   #2
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I leave my blower running all the time on purpose, to circulate & filter the air and to help even out the warmer/cooler rooms and upper/lower floors, so this isn't necessarily a bad thing.

First thing to check is obviously the simple thing, and that's to see if your fan switch (not the heat/air/off switch) is turned to "on" vs "auto" (I have too assume you already checked that but sometimes the simple answer is the solution). If not, maybe there's a problem with the thermostat. The thermostat, or the fan switch in the thermostat, could be bad. Or possibly some wires are crossing/touching behind the thermostat.

(Disclaimer: I'm not an HVAC tech, I just had this problem before at home and it was a bad thermostat)


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Old 05-31-2012, 11:25 AM   #3
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If all items mentioned by pucks101 are OK, the next thing to check wil be your control board. it is expensive, let's hope you won't have to go that far.
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