After having the same failures many others have had, I looked into the problem and found that in my case anyway, the failures are due to bearing failure at the front of the motor. If you have excessive water collecting in the inducer motor housing because of a plugged drain then you will have this failure repeatedly.
Trane (and the rest of the world) says that the variable speed motor is non-repairable. It is in fact repairable at a cost of some time and about $5 in new bearing cost. Much cheaper than the upgrade to the newer motor.
All you need to do is disassemble the fan housing and expose the fan wheel. locate the 4 holes in the plastic around the motor shaft. Drill and tap 4-40 holes 180 degrees apart using the existing holes in the plastic as a pattern. Fabricate a wheel puller out of a small piece of steel. Basically just a piece of steel with a threaded hole in the center (10-32 or 1/4-20 should work) and two more holes that line up with the two 4-40 holes you made in the fan wheel collar.
Drill out the center bit of plastic to expose the motor shaft, install the puller, pull the wheel off. With that done, disassemble the rest of the motor. You will need to de-solder some points on the circuit board, which should be obvious.
Once apart, replace the bearings with high quality SEALED bearings. The originals are un-sealed and this is probably the reason for the failures.
Once done, your motor is now easily rebuildable should these bearings fail again. I put silicone over the exposes holes in the wheel when I was done to prevent rust too.
Congradulations! you just saved $700 for a hour or two of your time!
trane xv90 inducer failures - original motor design
Trane (and the rest of the world) says that the variable speed motor is non-repairable. It is in fact repairable at a cost of some time and about $5 in new bearing cost. Much cheaper than the upgrade to the newer motor.
All you need to do is disassemble the fan housing and expose the fan wheel. locate the 4 holes in the plastic around the motor shaft. Drill and tap 4-40 holes 180 degrees apart using the existing holes in the plastic as a pattern. Fabricate a wheel puller out of a small piece of steel. Basically just a piece of steel with a threaded hole in the center (10-32 or 1/4-20 should work) and two more holes that line up with the two 4-40 holes you made in the fan wheel collar.
Drill out the center bit of plastic to expose the motor shaft, install the puller, pull the wheel off. With that done, disassemble the rest of the motor. You will need to de-solder some points on the circuit board, which should be obvious.
Once apart, replace the bearings with high quality SEALED bearings. The originals are un-sealed and this is probably the reason for the failures.
Once done, your motor is now easily rebuildable should these bearings fail again. I put silicone over the exposes holes in the wheel when I was done to prevent rust too.
Congradulations! you just saved $700 for a hour or two of your time!
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