My outside AC unit starts running then stops. I hear a buzzing noise, then I hear no sound coming from the unit. What could that be?


It sounds as if something is tripping on an overload or there is bad contact in the circuit. I couldn't offer more without testing the circuit.

Updated on March 23, 2018

Original Article:

How to Diagnose and Repair Your Air Conditioner (A/C) Capacitor
By Dan Robbins