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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Have a coleman furnace eb12b
Started by gitterdone, Jan 20 2012 04:21 PM
3 replies to this topic
#1
gitterdone
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Samanera
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Posted 20 January 2012 - 04:21 PM
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#2
gitterdone
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Samanera
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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.
Or lower speed switch is bad. Fan cuts off on high.
#3
Shootist
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Yamabushi
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.
I've also seen loose fitting filters in ceiling grills rise up and then drop when the blower stops.
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#4
gitterdone
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Samanera
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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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