Turn AC on and only get a hum, no Fan. Repair

If you are hearing humming from the motor itself, replace the capacitor. Should only cost you $10-20.

To rule out a faulty thermostat perform a jump test on the control board. There's a lot of videos and tutorials online for performing a jump test. I attached one of them for your reference, however with the humming, I am inclined to believe it is a faulty capacitor.

capacitor? will hum if contactor pulled in but no ac power. will hum if contactor pulled in and bad capacitor. depends on how lowd the hum is. loud hum prolly equals bad capacitor

Have you checked the capacitor? Try spinning the blower wheel by hand, if this gets the motor going you have a bad capacitor. If not, the motor will need to be replaced.

hi ;
the fan motor needs repair , the cause of humming is the vibration of induction on AC current in the motor.
if the motor stopped means it has faulty shafting and bushing, or maybe the starting capacitor needs a replacement, don't turn it on or use it to prevent burning of induction wire,
also it needs a qualified technician to repair ,

yes i would change the fan motor . and the capacitor

It can be the start capacitor,or the fan itself can be bad,replace the start capacitor,then if this does not help,replace the fan motor,sense you can start the fan by hand,and it runs for hours,it must be the start capacitor.

turn it off call repairman

If the fan just hums and if you spin the fan and it runs, check out the capacitor, it is bad. Most condensing units have a split capacitor, for the hermedic unit and the fan. If the compressor runs the dual capacitor is bad on the fan side. Your choice buy the dual capacitor, or just buy a single capacitor for the fan part of it. Make sure the voltage rating and microfarad ratings are the same. They will be marked on the old capacitor, as will fan (for fan), and herm for compressor). THATS 220 VOLTAGE YOUR WORKING WITH, BE SURE THE POWER IS OFF!!

hi there,
stuck up motor,could be capacitor check this out and replace.
could be relay.if defective replace.the motor has star winding after replacing capacitor and humming again,check start winding,if high resistance,replace motor.have a good day,rate me if your satified to my suggestion,thank's a lot

starting capacitor is bad (THE STARTING CAPACITOR IS A BIG METAL BLOCK MOUNTED ON OR NEAR FAN MOTOR)