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Q:

air conditioning blows hot on passenger constantly. on 2004 Hummer H2

Rookie cbe0621eac06868b3efe0d8d1d3611e23c60d3114864ea2ec19a68cfbd3eebab
while running ac at any position (head vent, defrost,floor vent) the passenger side blows extremely hot constantly.
(1) Answer
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On certain vehicles, there are seperate control units for each side of the car which can contribute to the blend doors not opening or closing.
If you need this diagnosed properly you can call one of our four stores @
1) Willowbrook (281) 890-9400 3) The Woodlands (281) 465-9410
2) Champions (281) 370-7900 4) Cypress (281) 304-7833