The problem is there has been a refrigerant change that gets thick when cold. It can knock the compressor out fairly quickly in a cold environment. The solution is to add a heater kit or buy a unit that is already garage ready.
I don't believe that's the problem on mine. It will not try to run, you cannot turn the thermostat down far enough to make it kick on. By-pass the thermostat by bugging the thermostat wires together and it will run and cool fine. Maybe the thermostat board has a built in safety that wont let it kick on, don't know, but it works fine if I by-pass the thermostat when it's cold in the garage.
