AC Thermostat

[K5DBM]

I have a 2006 H3 that blows full heat when the thermostat is set anywhere except fully counter clockwise (coldest setting). If I turn the thermostat 1 click to the right, it will start blowing full heat out of the vents in 5-10 seconds or so. There is no middle ground, you either have full AC or full heat. Any ideas on where I start to fix this? Thanks in advance.

 

[alrock]

You have two options: replace or repair the HVAC control unit. If you are under warranty or have a few hundred sitting around, the new control units are supposedly upgraded to have this fix.

If you're not under warranty and only have $5 available, then this fix will do it for you: http://www.hummer4x4offroad.com/forum/showthread.php?3962-Climate-Control-fix&highlight=resistor

This does the trick - many of us have done this and it's not difficult. If you have questions, just let us know.

 

[K5DBM]

No warranty. I'll be doing it myself. Thanks alrock!

 

[poncho1965]

I did the resister fix, works great and was easy to do!


Mike