Ok guys looking for some help with an issue I’m having on my 2004 Hummer H2. When heat is up on 90 deg drivers side blows out very hot heat (90 deg heat) the minute you cut it back to 89 deg or lower it gets cold not a/c cold but cold. The passenger side works perfectly. Any help would be greatly appreciated.

 

The control module takes input from many sensors but the most important for this task would be the duct temp sensor and the actuator door to adjust the temp. To really tell what's going on you need to get someone to look at these sensors and see what they are doing.

Neal