2003 Hummer H2 Logo
Posted on Aug 29, 2009
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Driver's side air blowing warm, won't change

Regardless of temp setting, the driver's side blows, but doesn't alter temp. Just blows hot or warm air. Passenger side responds to the settings on the control panel properly... air is cold, heat is hot. Driver's side doesn't change, though. Can turn the dial down as low as possible, or high as possible, and just get warm air blowing. Still get proper automatic shifting of vents used (heat on feet and legs, cold on upper vents) but the temp doesn't change. Like I said, the passenger side works just fine.

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Greg Mills

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  • Master 497 Answers
  • Posted on Aug 29, 2009
Greg Mills
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Sounds like there is a crack in the vent that leads to the drivers side, and hot air from the engine is leaking through.

  • dfrankelmsc Apr 24, 2014

    Your actuator is most likely bad. I had to change mine for the same reason and it is now good to go.

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Bogdan Odwazny

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  • Hummer Master 6,171 Answers
  • Posted on Jul 01, 2013
Bogdan Odwazny
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Could be but air is regular cold no sing of a/c.When blows on windshield halve shows water mark.

  • Bogdan Odwazny
    Bogdan Odwazny Jul 01, 2013

    Could be but air is regular cold no sing of a/c.When blows on windshield halve shows water mark.

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