I recently bought a used 2005 suburban. The heat does not work on the drivers side. The climate control module has been replaced as well as the blend door actuator. We hooked up a power probe to the actuator to see if we could manually switch it to heat and it worked but it wont stay on heat. We actually ended up frying the Climate control module when we did this and had to replace it again. What else could be causing this problem. Its almost as if the climate control is stuck on cold on the drivers side and when you turn it to heat it doesn't register that you have turned it to heat. Any help would be much appreciated.

 

I had to do a relearn for the climate control on mine after having the battery disconnected for over a month doing engine work and replacing a few control switches.

 

We calibrated the climate control module to our vehicle and it's still doing the same thing.

 

There are 3 of these actuators.