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This is usually a bad capacitor or bad fan motor. The capacitor is located inside the electrical panel on the outside unit. You can check these by using a meter that measures Mfds (Microfarads), most of the time you can visually see the capacitor swollen or blown. The fan motor can be checked by a meter that measures ohms, really high ohms are usually bad. If you can't spin the fan blade easily, then it's locked up. What usually happens, the capacitor or motor windings go bad, doesn't spin the fan blade, overheats the compressor so it kicks out on thermal protection till it cools back down, and sometimes the motor will overheat and go into thermal protection also. Just make sure you are getting the 220v to the outside unit too, but shut all power off before doing any trouble-shooting. Hope this helps, feel free to ask any questions!
Is the compressor running? Check the circuit breaker or disconnect that is close to the outside unit if it isn't. It may be tripped on high pressure since the fan isn't running. If the unit has power, use a screw driver or something that will reach the fan blades and spin the fan to make sure it turns freely. If it doesn't the fan is probably bad. Next, check the capacitor for the fan motor. If it looks swollen then it is bad, otherwise check it with a multimeter. Most heating and air suppliers will test it for you. If the capacitor is good, the problem may be you fan motor.
You can check the fan windings with an ohmmeter.
Chances are you have a bad capacitor in outside unit. Take off cover to wiring. It is a oval silver cylinder. See if it is swollen or oily. If so replace, Also check for burnt wires on capacitor or contactor. Russ
Check your outside unit to see if fan is running. If it is running check to see if air is blowing out if not you have a bad capacitor. Some times if a capacitor shorts out the fan will run backwards and the line will get very hot same as if the fan is not running. Russ
Hi, Could be a run capacitor on the fan motor. They usually swell up and or leak when they go bad. If not, the only real way to test them it with a specific capacitor tester. A new capacitor would be cheaper. Make sure that the outside unit is disconnected from power before opening it up, try to spin the fan blade by hand. If it doesn't spin freely it may need oiled if possible. See above solution. Your problem is the fan motor though so if this don't do it, It will have to be replaced. If this helps, Please rate my solution.