Question about Heating & Cooling
There are two things that can cause that...
The first would be a bad board or relay on the board... the relay is not releasing completely or the board is shorting and causing the relay to bump....
The second would be the high limit bumping and triggering the board to bump the motor...
What I would do is to pull one of the wires from the high limit switch right after it runs and shuts down to see if the problem continues... if it does then the board is bad... if it stops and stays off then the high limit is bad... replace that....
Hope you followed all of this and that it helps you...
Posted on Jan 05, 2011
It sounds to me like your fan off limit switch is set to low if its adjustable or almost worn out if it's not adjustable. I would like to be of more help but I need more information,such as age and size of your furnace and type of limit switch if you know. Thank you.
Posted on Jan 04, 2011
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Posted on Jan 02, 2017
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