Why Is My Outside AC Unit Humming but Not Turning On?

Question:

Why is my outside AC unit humming but not turning on?

Answer:

An AC unit humming but not turning on is often caused by a faulty capacitor, a tripped circuit breaker, or a malfunctioning compressor. When the AC capacitor fails, the fan motor does not receive power, resulting in a noticeable humming or buzzing sound. It's advisable to seek assistance from a qualified HVAC contractor for inspection and necessary repairs.