Kimmer4444
Jul 9, 2011, 12:43 PM
I have a Trane X78 furnace/A/C system that has begun to have a "tinging" noise coming from the blower motor. I took the covers off the front and watched the drum slow after it was shut off. The noise had a rythym to it that makes me believe that the bearings (if there are any?) may be going out on the unit. Could anyone provide a troubleshooting list for me to go through to narrow down or eliminate the source of the noise. The unit is 20 years old.