2001 Dodge Ram AC heater control

2001 DODGE RAM
47,000 MILES • V8 • 4WD • AUTOMATIC
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WATERDOG7302
  • MEMBER
  • 1 POST
I have a door at the heater coil that will not hold. Its all heat or all cold. If i hit the brakes i can hear the door close. If i make a adjustment on the heater control knob i can hear the door close shut. if i turn the fan on high i can hear the door close and i get all heat when this happens. if i turn the fan on low i get the ac back. I have no control over that door. PLEASE HELP.
Apr 10, 2010 at 10:12 PM
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JACOBANDNICKOLAS
  • CERTIFIED EXPERT
  • 110,175 POSTS
It sounds like the linkage has come off. Under the dash on the passanger side (HVAC) box, check to make sure the linkage is still attached to the vent door actuator. If it is, make sure there is vacuum to the actuator. If all looks good, the blend door is the problem which requires part of the dash to be removed.
Apr 12, 2010 at 12:31 PM