[Overdrive]

I guess it's possible? I'm not sure if the 03s are set up the same way, but on my car the temp sensor is on the right side front grille and it rests in a really crappy little plastic hoop. Occasionally it can fall out, and obviously it won't be doing its job. Maybe, if yours is in the same place, it came out of its retainer and is in contact with the radiator. Auto A/C or not, though, if you set it to Low it should blow cold air. Does the A/C work in manual mode?