Hey Everyone,
I have a 2004 Grand Prix and for the past several years, when the weather gets warm after winter, the car will continue to blow HOT air only for several weeks, sometimes into May before going back to normal and blowing cool air. This happens every year and there is no real rhyme or reason for it. I have flushed the coolant and replace the thermostat. I have charged the A/C but issue still happens. GM cannot seem to fine an issue. As I stated, the issue rectifies itself after several weeks of warm weather but just wanted to see if anyone else has had an issue like this? It's annoying driving in 20C weather and having hot air blowing on you. I thought maybe the trap door was stuck but it fixes itserlf on it's own so I am at a loss?
Derek
