Engine cooling fan not working. 2005 PT Cruiser touring (POS model) . The A/C worked great for about an hour, the lines to the compressor were ice cold, then got really hot, after that...NOTHING. New head gasket, new cooling fan (6 months old) new water pump and timing belt, new radiator, new thermostat, new low pressure switch for A/C. All of the relays check out OK including a new one for the low speed fan. Code 0480. Fan does not come on when A/C is activated. Compressor used to cycle but now does nothing. Does not overheat. I have no idea what else to do.