Window AC Unit

Hi, Sitting for a year or more don't hurt them but bugs dirt and water could. Depending a lot on the size and quality of the unit, there are usually no charge ports on a window unit and the parts and tools to charge it would probably be about the price of a new unit. If the fan motor is running and the compressor is running and it wont cool, I would call around and see what someone would charge to repair the leak and recharge it. The price would be better if you delivered it to their shop for repair. If the fan runs with no compressor, probably needs a thermostat or switch. No fan, Needs a fan motor or has something blocking the fan motor from turning, stick, dirt daubers nest, whatever. In most cases though, if its not a simple fix, A new unit would probably be your best bet. Hope this helps.
kstfas