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Old 12-07-2010, 11:20 AM   #1
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Furnace fan won't shut off


Did not notice this summer whether or not this was happening, but very noticeable now that the weather is getting colder. My heat is set to on....fan to auto. When desired heat is reached the unit shuts down, but there is cool air blowing through the vents. Went to basement and can hear the fan running. This is constent. I am not sure how to turn it off??

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Old 12-07-2010, 11:45 AM   #2
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Furnace fan won't shut off


have you done any wiring, replaced t.stat ,etc,etc, ? If not probably stuck fan switch,relay. How old is the furnace ? this info. would help

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Old 12-07-2010, 12:27 PM   #3
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Furnace fan won't shut off


Could be a stuck relay, shorted circuit, or possibly simply the t-stat is improperly wired?
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