I noticed in the last few days that I'm also having problems when the blower motor is on full, heat is cranked all the way, and fan direction is set to defrost the windshield. Could this somehow be the blower motor that originally seemed to be an A/C problem? If so, how would I tell? Or could it be something else and how could I tell?
I'm sure I could learn to replace the blower motor (via the video below) and my Haynes book, but I'd rather not break the seal and order a factory kit to reinstall the blower motor, especially if nothing is wrong with the motor.
2006 Cobalt LS, 5-speed, K&N Air Filter, otherwise stock -- can't afford an SS *sniff*