'09 Hummer H3T Adventure 5cyl 109k
Hey guys, I have something going on with my climate control, the a/c only blows cold on the far left setting but goes to hot one notch over. I've already done the climate unit reset (hold a/c, defrost till blinking stops) but that didn't seem to help the problem. Do I have to buy a whole new unit? Thanks for the help guys.

 

Clifford _H3T,
I am guessing that you are referring to the temperature setting ****! First thing I would do is to thoroughly clean the contacts. Yes, use the CRC spray everyone has mentioned before! You can buy the various CRC products at ACE as well as just about any auto parts store. Next time, include photos to help those that will try to assist you. Keep us posted on your progress.

 

Yes, I'm referring to the climate selector ****, I didn't think to clean the contacts but I'll definitely try that to see if that helps. Thanks for the tip GH.

 

You need the 'resistor' fix. See below.