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Hi my name is Robert....
I would get up on the roof and remove the shroud, make sure the fan is spinning, I have seen issues where the unit sits and wasps or mud daubers like to make nests under the shroud near the fan motor. Make sure you arm yourself with some spray if that is the case.
IF you have good AC voltage and DC voltage I would inspect the capacitors, you do not want to touch them as they store high voltage, many times when they fail you will see the wire burnt on the top of the capacitor. Make sure you have no loose wires or chewed wires, sometimes rodents can cause issue so I would be looking for any signs of that, beyond that it could be a bad compressor if the capacitors are good, if you like I can send you a service manual that covers most models and will allow you to check the compressor out.... Hope this helps some... Robert
Hi.... Was just checking in to see if my answer helped???? IF you have more questions or concerns please feel free to contact me...