Hi all,
My bathroom fan is about 30 yo Nutone Model 8831 FWIW. It does not move a lot of air, as it's rated 76 CFM, but adequate, since it's 1/2 bath w/o a tub.
The falp valve spring has rusted out and it no longer closes, which in a winter caues a draft. The fan is mounted in wall. I would try to fashion a spring for it, if I could remove the fan, but it seems that I would have rip the wall apart (it's drywall).
Hate to thrash a working fan for a tiny spring, but there's no way to do anything with the fan in place.
Anyone been successful with a similar project?
Rich