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224 Posts
Discussion Starter · #1 · (Edited)
I found this leak happening in my son's furnace yesterday.
The 2 bolts (just screwed into plastic) holding the white pvc
pipe to the black blower motor were not sealing the pipe and
there was a constant drip. Are the 2 bolts normally nutted to
hold? I replaced the 2 bolts with bolts with washers and nuts
and stopped the leak. I am guessing that the exhaust gas
may have been leaking out also? Your thoughts?


1,257 Posts
Can't comment on how much carbon monoxide may have also leaked a bit.

But, right behind silver clamp, notice a bit of black schmutz. That's because there used to be a pliable type black putty where the pvc meets the backside of the clamp. You've solved the condensate drip. Now for safety, make a snake like bead of putty to place around the pipe and press into position. If you are a silicone insister, 100% silicone globbed all the way around will also work.

It appears this may not be the original induced draft fan. Whoever swapped in a new one didn't follow instructions.

Putty or silicone on both sides of clamp wouldn't hurt.

42,395 Posts
Some CO was also coming out. How much, no one can say for sure.

Usually, the bolts/screws just grab the metal flange.
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