Why is outside AC unit not running?

 Why is outside AC unit not running?

Check the circuit breaker and see if there is a blown fuse.

There could have been a blown fuse to the circuit breaker that caused the outside AC unit to stop working correctly. A blown fuse is caused by an overloaded circuit breaker, which can happen if the AC unit is overworked or the wires are loose and aging.
Check the low voltage at a/c. Did someone hit it with the weed eater?
If air conditioner is buzzing turn off the power you have a short.
Call Aaac Service heating and air 7708754113 to get the problem resolved. 
Air conditioner won't start resolved McDonough Aaac Service heating and air