Why won't my Goodman air conditioner turn on?

Answer 1

This one is hard to answer without more infos, such as the model number, or type of AC (heat pump, window unit, etc.) For now, check to make sure it's getting the proper electricity (there should be a nameplate on it somewhere that describes what and how to feed it) as well as 24V control power to the thermostat. Also check the thermostat wiring. Obviously, you won't have control power if it's a window unit, but you will for a heat pump. Troubleshooting this stuff isn't hard, but it does take some time and reasoning efforts.