Atwood furnace blower squeel

When I had this problem I found out I had a little side to side movement of the fan shaft. What I did was use a long Allen wrench Loosen the right fan on the shaft. push the left fan to the right and the right fan to the left, and tighten the right fan. My noise came from the right fan rubbing on the fan housing. I think you will be able to see a hole in the right fan housing for the allen wrench loosen the set screw on the fan shaft.

2oldman wrote:

chuckbear wrote:
Might just as well do it now as do it later since the bearings will freeze up at the worst possible time. Chuck

x2

I recently had mine replaced, and I was surprised at how hard it was to turn the almost-seized motor rotor. I believe there's just sleeves in there, not bearings.

Just is correct, no bearings in these motors, just sleeves.

My auto mechanic told me that noisy fans can sometimes be fixed by running the fan constantly for a long time .... tried that on my squeaky furnace fan and ran it for about an hour straight - haven't heard a squeak in 6 years.

chuckbear wrote:
Might just as well do it now as do it later since the bearings will freeze up at the worst possible time. Chuck

x2

I recently had mine replaced, and I was surprised at how hard it was to turn the almost-seized motor rotor. I believe there's just sleeves in there, not bearings.

Had the same issue. Lubricating is a temporary fix. We just replaced the blower motor and now the unit runs even quieter than before the squeal started. Might just as well do it now as do it later since the bearings will freeze up at the worst possible time. Chuck

The squealing will only get worse, and lubing is difficult and will only delay motor replacement.

you can lube it all you want but you will eventually have to buy a new motor

There's only one motor with a fan attached at each end. It's possible to remove the fans from the motor shaft and lube the motor bushings, but that is usually just a temporary fix. Eventually you'll likely need to replace the motor. Nearly all service work on the 8500 series furnaces can be performed from the outside without removing the furnace from the RV, including replacing the fan motor. A comprehensive Atwood/Hydroflame manual can be found here. Page 14 has instructions for removing/replacing the motor relative to a recall, but they work just as well for other motor service of course.

You could try taking the housing off to get to the motor and try light machine oil.
Might think about ordering new motor
Motor
There is a small hole on the right side in the fan housing to insert a long (1/8 inch?) Allen to take fan blade loose