The fan blade on the condenser fan motor might be defective or loose.
Trane fan motor noise.
Check both fan blades to ensure that they are not rubbing against the housing.
Motor is an ecm and it makes a low pitched whine sound when in circ or when the blower is ramping up or slowing down to stop.
Benefits the q quiet fan the trane model q fan generates less low frequency noise more difficult to attenuate than any other.
Motors and arrangement 9 horizontal or vertical mounting it can be selected in class 1 2 and 3.
Trane xe 1000 fan motor problem solved the fan on the outside trane xe1000 unit is making a terrible squealing noise when running otherwise everything working fine cools heats house like always.
The low pitched whine stops when fan is in high speed.
Arrangement 9 permits factory mounting of the motor on top bottom or either side of the fan see below.
It happened about 3 months ago as well but i took the top off turned it upside down and was able.
The fan blades might be scraping against the blower housing.
The noise is there in heat or ac.
If the motor shaft is loose tighten or replace the set screw.
Trane xr95 draft inducer motor noise whine whistle duration.
If the blades aren t rubbing against the housing and the fan motor is still noisy check the fan motor bearings for wear.
United states restricted mode.
R fan motor is still making noise replace the fan blade.
New xv80 trane furnace makes noise when blower runs at low speed.