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Old 11-22-2005, 06:31 AM  
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Default blower fan won't shut off

I have a ComfortMaker forced air gas furnace.Model #GUH075A012CIN.Ever Since it was new,it doesn't shut down after it has gone thru its cycle,that is it continues to blow cold air until u manually shut the furnace off,or turn the thermostat down.This doesn't happen all the time though,which is baffling.It has a troubleshooting code on it which says that the pressure switch is stuck open.I have replaced the pressure switch,put it a new thermostat,cleaned sensors,but problem is still there.Could this be a venting or condensation problem

Any suggestions would be appreciated

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Old 12-05-2005, 08:30 PM  
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Thats what the pressure switch does. It proves venting. Yes the problem could be condensation or a venting issue.
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