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If this system is an older unit, and it's the original motor chances are your motor is on the way out. Hopefully the service tech. installed the correct size capacitor last month. What was the reason for the service call last month. If same problem, I would consider replacing before it stops. If your mechanically inclined you can change out yourself. Get a OEM motor, so the wiring hookup is the same and get a new matching capacitor.
Should I order a capacitor and change 1st before changing the motor. Is it normal for a fan to just all of a sudden start running in reverse?
the unit was installed in 2006 when house was built
Capacitors are not expensive, you would need to find out if you have a three terminal or a two terminal capacitor. A three terminal capacitor has hookups for the compressor and fan motor A two terminal cap. hooks up to the fan motor only. So located the run capacitor and find the MFD rating on the cap. It will state on the side something like 35/5 370 volt or 440 volt the 35 Microfared is for the compressor the 5 MFD is for the fan motor hookup. Motors worst enemy is heat, your internal motor windings may be breaking down due to heat, dirt, uneven voltage over the years.
I have this info.. It is a 3 terminal.
Have you ever experienced a fan running in reverse on its own?
If you have did changing the capacitor correct the direction of the fan
Fan only turns when unit cycles on. I will replace capacitor see if it corrects. If not I will replace motor