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Old 01-18-2010, 10:45 PM   #1
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Blower Fan comes on/off every couple minutes


Recently my the blower unit in my house has started kicking on every couple of minutes. It stays on for a few seconds (literally less than a minute) and then stops. A couple minutes later it comes back on.

I have a heat pump, however this is just the blower fan in the house that is coming on, not the cooling or heating functions on the heat pump.

I thought this had to be the thermostat so I replaced it today and the new one is doing the exact same thing. (Tried both a Honeywell and a Hunter).

Does anybody have any idea what could be causing this?

Thanks!

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Old 01-19-2010, 12:11 AM   #2
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Blower Fan comes on/off every couple minutes


Could be your furnace limit circuit is f-ed.

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Old 01-22-2010, 11:45 PM   #3
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Blower Fan comes on/off every couple minutes


Ended up replacing the blower's circuit board and that fixed the problem.
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