Growing Issues May Be Electrical - 2006 Sierra

[Orion231]

2006 GMC Sierra 2500HD. I just had my AC stop blowing cold air and now blowing hot air. The evaporator is getting very cold however so the AC seems to be working. Is this an electrical issue with the blend door? Other apparent electrical issues include the radio never turns off automatically when I get out of the truck and lock it, the passenger electrical door lock works but the driver electrical door lock does not, and recently I had the dome light staying on but that seems to have resolved itself, maybe. Thanks.

 

[MILO]

could be actuator that runs the blend door

 

[NioMarvin83]

It sounds like you might have a few different issues. Since the evaporator is cold, it means the AC system is working but there might be a problem with the blend door or actuator. The blend door controls the mix of hot and cold air, and if it's not working, it could cause the air to blow hot.

The other electrical issues you mentioned, like the radio and door locks, could be related. Sometimes electrical problems can be connected. It might be worth checking the fuses, relays, and wiring connections. If you're not sure, it could be helpful to have a mechanic look at it to diagnose and fix the problems.