We don't have a lot of Hummer H3 AC / heater problems on file — feel free to add yours here. The most common H3 AC / heater problems cost $0 to fix & occur at 90,000 miles. Click on a year below.

Worst AC / Heater Problems
A/C / heater not working properly 2007 Hummer H3
blower stopped working 2006 Hummer H3
hvac harness ab=nd resistor burnt out 2008 Hummer H3