Will the fan still turn by hand?
Was it running and quit or did the thermostat shut it down and it not start?
Did it never start turning?
If it still turns that rules out bearings.
If it was running and made a squealing noise and quit that is bearings (mine did this).
If it was running and did not start back up after cycling off it could be the capacitor.
If it never started it is either the capacitor or the motor is bad.
Mine locked up one June, I climbed up top and took it apart, identified the motor number and lucky for me Dick Gore's was right down I95 and they had one in stock. About a 2 to 3 hour job for me to change out and it was my first time doing it. I took pictures as it came apart just in case memory failed me and I put it back together without any issue.
Make sure you have power going to it and check the capacitors, they fail and that may be your problem and not the motor.
Mine is also a Coleman 15K ducted. It has not given me any problems since. I think the fan motor was about 115.00.
Chris
Chris & Dianne
Jayco Designer 3110 SOLD 6-11-2016, looking for the next one.
F250 PSD 4x4 Crew Cab