Just recently purchased an Accentra insert (used). The exhaust blower is making some squealing noises. I don't see any place to grease this and can't find anything in the manual that says to do so. Does anyone grease the bearing? Also I've read in a thread at some point that the ignitor resistance can be checked to verify it is working properly but I'm trying to figure out where to take this resistance. The blue wires from the circuit board disappear into the burn pot area and I can't follow the white/green striped wires from the ignitor itself back to the connections between the two. If I had to replace these parts how much would they cost (exhaust blower or ignitor)? Thanks.