Originally Posted by mysterym

Most systems do not work in the winter and can be damaged if attempted to be run in winter. Its actually usually harder to cool when the outside temperature is <60 than if it were warmer. Depending on the unit there are usually warnings not to operate below a certain temp if you read the manual. Large buildings usually use chiller systems and they have to be drained for winter. I would say its rare for AC to work in winter unless you have a system that takes cold air from outside and just blows it inside versus using a condenser.