I have a P61 a Harmon and there is a squeaking noise coming from the intake box where the fan is. I completely removed the box and fan and motor and cleaned all of it out. Using the Allen wrench I removed the fan from the shaft and gave it a shot of WD 40 and resembled the whole thing. Amazingly the squeak went away...But...It's back. After 12 hours. Is it possible that the shaft on the motor is warped? Or the fan itself?.. or even the bit screw that holds the fan onto the shaft? When she does squeak now I give it a shot of the WD-40 and she's good to go for a while. What Am I missing? I've had this stove since 05 and it's my main source of heat in the house, which was all electric. I really like this stove. Any ideas before I start replacing part by part? Thanks.