09 Traverse - no rear heat...RESET HVAC?
So I'm almost done with my punch list on my 71k 2009 Traverse 2LT. I have one other thing left to address, getting the rear vents to blow heat again. I know it worked when we bought the truck in December, but from there until now, it has stopped working, it just blows cold air.
I've checked the level of coolant and while it was a little low in the expansion tank, the radiator was full. I topped off the expansion tank to the full cold line when it was cold and no change. The driver's side and passenger's side temp and location controls work fine. The rear works as far as floor or vent but it will be blowing cool air no matter what the temperature it set to.
I've read about faulty actuators and HVAC resets. Before I tear apart the interior to replace an actuator that may or may not be bad, what exactly are the procedures for the HVAC reset? I've searched and have seen different things. I know you have to pull the HVAC fuse and leave it out for awhile, but is it the one in the interior fuse box or under the hood or both? I've read to turn the temperature control to Auto and then shut off the car, pull the fuse, wait 10 minutes, install the fuse, start the car and the HVAC system will be set to 74 degrees and then start to re-calibrate itself. Is this correct? Any input is appreciated.
2009 Chevrolet Traverse AWD LT (2LT)
2007 Hyundai Santa Fe Limited AWD
1985 Chevrolet Corvette Z51