2003 Dodge Ram AC/Heater control

Tiny
GRANTI
  • MEMBER
  • 2003 DODGE RAM
  • V8
  • 4WD
  • AUTOMATIC
  • 105,000 MILES
AC/heater control does not respond when dialed to different settings, ie; floor, vents, defrost etc.
No matter where you turn the selector the air blows
out of the vents only?
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Tuesday, October 6th, 2009 AT 1:28 PM

1 Reply

Tiny
BMRFIXIT
  • EXPERT
In this year I believe its all controlled by the HVAC module
and have actuator that move doors
need of scanner is more likely to diagnose the correct faulty actuator


http://www.2carpros.com/forum/automotive_pictures/99387_Graphic1_540.jpg



MODE DOOR ACTUATOR
DESCRIPTION
The mode door actuator is a reversible, 12-volt Direct Current (DC), servo motor (Fig. 17 ). The single mode door actuator is located on the driver side end of the heater-A/C housing unit, close to the top of the distribution housing. The mode door actuator is mechanically connected to the mode door. The mode door actuator is interchangeable with the actuators for the blend air door(s) and the recirculation air door. Each actuator is contained within an identical black molded plastic housing with an integral wire connector receptacle. Two integral mounting tabs allow the actuator to be secured with two screws to the heater-A/C unit housing. Each actuator also has an identical output shaft with splines that connects it to the linkage that drives the mode door. The mode door actuator does not require mechanical indexing to the mode door linkage, as it is electronically calibrated by the heater-A/C control module. The mode door actuator cannot be adjusted or repaired and, if damaged or faulty, it must be replaced.
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Wednesday, October 7th, 2009 AT 6:42 AM

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