Well, I had another combustion blower motor bearing go bad(started squealing). I had saved the one I swapped out from the last time one went(three years ago).I have a new one on the way($214.00).I'm going to take out the bearing on the one that's squealing and see if I can get a part number. Maybe there's an equivalent bearing that's more durable at high temps. I think that's what's causing the bearing to crap out; high temp is drying out the lube inside. In the mean time has anyone out there investigated this before? I have experience with replacing bearings and assembling components, so if this pans out, maybe I'll start an online service retrofitting blower motor bearings that will hold up longer.