Sealant for furnace vent

Joined
Mar 14, 2003
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8,711
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Nothern USA
The AC quit on me. I haven't figured out exactly what the problem is, but the furnace blower keeps stopping. Thinking the motor was bad, I pulled it. Runs fine on the bench. I let ti go as long as a half hour, and the motor didn't get hot. Removing the motor meant removing a section of vent. It was sealed to the heat exchanger outlet with some white junk. I had to use a torch to get it loose. So what do I reseal it with? I am not sure how hot it gets, but surely too hot for caulking compound. Gasket cement?
 
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Mar 16, 2004
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7,256
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USA
After this patch up job purchase a CO detector if you do not already own one.
 

labman

Thread starter
Joined
Mar 14, 2003
Messages
8,711
Location
Nothern USA
 Originally Posted By: TooManyWheels
Lowes and HD have the appropriate sealant. It comes in a small bucket, about $8-10(?).
I am surprised they carry such a specialty item.
 
Joined
Feb 21, 2003
Messages
3,775
Location
Houston, Tex
 Originally Posted By: labman
I am surprised they carry such a specialty item.
Its in with the metal ducting, which, technically, is supposed to be sealed too, although it often is not.
 
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