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-   -   Blower motor in old bryant furnace runs constantly (http://www.diychatroom.com/f17/blower-motor-old-bryant-furnace-runs-constantly-76268/)

GetYourShineBox 07-15-2010 07:13 PM

Blower motor in old bryant furnace runs constantly
 
the other day i went into an apartment to do a "turn over" and noticed the furnace service switch was off. i turned it on and the blower kicked on immediately. so i went over to the thermostat and it was in the off position. fan in the auto position. then after noticing the blower running i noticed the condenser is turning on as well. i changed the thermostat and that wasnt the problem. so i thought ok it might be the board. changed the board the next day. same thing happens. when i disconnect the high speed wire for the blower from the board the blower motor hums and the condenser still comes on. the furnace is a 1988 bryant 70 %. any ideas? besides throwing it off a tall building.

beenthere 07-15-2010 10:28 PM

Get your meter out, and check for shorts in the low voltage wiring.

GetYourShineBox 07-20-2010 07:49 PM

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