Roof AC hole size

[Van]

Start capacitor maybe? Is there even one of those in there? I'm guessing here.

[chev49]

i would suspect either the capacitor or the compressor motor itself if it has electricity going to it... have you checked to make sure you actually got elect at comp? motor should at least try to run if it n the capac is good, then maybe shut off..

[artvonne]

  Maybe check resistance at the motor terminals to see if its open or shorted?