Atwood Hydroflame 7900 II Screeching - Motor replacement?

Both my bathroom fans screeched at our house. A few shots of WD40 has lasted over 5 years so far (no screeching of any kind). So you might try that. WD40 is not advertised as a lubricant, but for some applications it seems to work quite well.

 

Nope, not the motor ... it's the fan pivots/ bearings/ axle -- whatever. After a few years they dry out -- the heater in my former camper did that for years. Usually the noise would stop after the fan and unit warmed up and yes, it is temperature sensitive. I tried several times to get at or into the fan housing but found it would require more disassembly than I was prepared for. We didn't use the heater enough to make it a big problem.

 

If you can access the fan bearing mounts to lube them, that would be best. I have the same thing on my woodstove fan. Motor is actually fine, but the other rotational points need periodic lubing.

 

Try to oil it first. Use motor oil if you can.

 

I would use electric motor oil. If you can not find any 3-in-1 will ork.

 

3 and 1 gets gunky to fast. Dont ever use it. Nothing will beat out plane old motor oil. It evaporates less, so dosent seize up. I use it on everything now that i know that. I used to do a lot with model trains, one guy there was a oil expert( he atually made it and tested it) , lol. And with all the stuff that sat around and didnt get constent use the motor oil did the best. I then remember as a kid oiling the door hinges on the house. Then later in life noticing how sticky they get. All 3 and 1 oil. Motor oil will atually help dislove the older gunked up stuff and make it unsticky. Never used electric motor oil, and no one i know on the train fourms ever did either? Might be good.

 

Could be the bird cage fan on the moter too.. seen them fail in a number of vehicles.