Your compressor pumps refrigerant from the outdoor unit (condenser) to the indoor unit (evaporator). During this stage, the refrigerant is a cold liquid that absorbs heat from inside your home.
As it collects more and more heat, the liquid refrigerant begins to turn into a vapor. Once it contains as much heat as it can hold, the (now vapor) refrigerant travels back towards your compressor, bringing the heat with it and away from your home.
Once the vapor refrigerant arrives back at your outdoor unit, your compressor sucks in the refrigerant and heats the refrigerant up even more until it’s a superheated gas.
And because heat naturally moves to colder spaces, that super hot refrigerant can dump a lot of its heat into the cooler outdoor air. As it loses more and more heat, the refrigerant turns back into a liquid.
When the refrigerant loses most of its heat, your compressor sends it right back to your indoor unit to repeat the process until your home is cooled to your desired temperature.
Most common problem: Over heat and bad winding or even bad installation such as over charge or undercharge the compressor