Greetings,
I have a 2500HD GMC that the air conditioner will be blowing cold air one moment and the next is blowing super hot air. The compressor continues to function but no cold air to the cab. This is not a new occurance, it first occured two years ago and I was advised to disconnect the batteries and let the system reset.
It worked for a year and a half but in the last two months it has happened a number of times and seems to be getting worse.

Hoping someone can offer insight into a cure.

those have electronic actuators for the blend doors, and that is a frequent issue, my old mans is doing it now but he doesnt want to pay for the parts to fix it there pretty pricy

thanks for the input!
I will dig into the accutators and their issues.

how do you make out with your problem?