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Have a coleman furnace eb12b


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3 replies to this topic

#1 gitterdone

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Posted 20 January 2012 - 04:21 PM

Seems it is getting louder when it cuts off. Blower motor that is.
I know they make some noise when cuts off..
But seems it thumps hard here latley.

Reply much appreciated.

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#2 gitterdone

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Posted 20 January 2012 - 04:51 PM

Never mind... either duct work exspanding when blower is on..turs off thump duct work/plenum settles back.
Or lower speed switch is bad. Fan cuts off on high.

#3 Shootist

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Posted 20 January 2012 - 06:24 PM

It's probably your return plenum sucking in from the vacuum and popping back out when the blower stops. Try putting a heavy box or a few bricks on top of the plenum. Also make sure your filter isn't getting stopped up. A dirty filter will create even more vacuum.
I've also seen loose fitting filters in ceiling grills rise up and then drop when the blower stops.

#4 gitterdone

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Posted 20 January 2012 - 06:35 PM

Thanks man.for the reply...Filter alway checked...going to look at plenum ..might need a few screws ect.




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