[lexefx]

I have a Trane XE 70 split unit. 19 years old, current motor and cap are 10 years old. The blower motor stopped working on AC. My AC outdoors runs fine.

Motor issue persists regardless of Tstat settings - I tried heat & cool, auto and on. (left in the on position).

Opening up the ahu, the motor smells warm, and the back is warm to the touch.

If I cool the motor down with a box fan for a few minutes, the motor will restart and sound labored running 2-2.5 minutes then shuts off.

Any ideas? TIA

Lex

[KC13]

Either the run capacitor has failed, or (believe it or not... believe it) the motor has shunted windings, a.k.a. bad motor.

[lexefx]

Thanks KC13.

How difficult is replacing the blower motor, and new running cap? I am willing to try, pretty comfortable with electricity.

[KC13]

For the average D.I.Y.er, obtaining a replacement motor can be more difficult than the actual replacement itself. Trane uses a unique mounting bracket for their blower motors which can be a little tricky for the inexperienced. If you really endeavor to do this yourself, take your time and pay close attention to the assembly and the wiring. If you run into a snag, posting pics here will probably result in capable help from one (or more) of the wiley, veteran members who make this site great.

[lexefx]

I had a Marathon Cat # X004 in there. I got one shipped in 1 business day with cap for $110 (from R/S Baldor, Leeson, Fincor & Marathon Electric Motors, Sales, Repair & Service 800 279 2267 ask for Mike) Install was easy - took 1 hour - and I have AC again :)
Thanks KC13 - you were right!

Lex