You did not mention if the system you have is electronic(digital control) or manual(control knobs) but what your problem is, is a vacuum leak. Defrost and heat or the default postions for no vacuum. If it works ok until you press max air Then you will need to check the outside blend door vacuum motor. It will be the white vacuum line going from the control head.
SOURCE: Heat wont blow through heater or defroster vents
common problem, check under dash by the gas pedal if control arms are muving went selecting from ac to heat cuz this it is the control for the vents to go from ac to heat and to defrost.
SOURCE: PROBLEM WHEN SELECTING THE DIRECTION FOR THE AIR
Sounds like you have a supply vacuum problem. When you lose supply vacuum to the control head it defaults to defrost.
SOURCE: A/C not blowing thru vents just defroster and floor
It is a vent door actuator motor on top of the blower box,the dash has to be removed and set in the seats to replace the actuator motor.Cost for the part is about 50.00 dollars
SOURCE: 94 dodge ram 1500. during acceleration the air
You have a vacuum leak or the little valve in the vac line on the passenger side of the intake is bad
230 views
Usually answered in minutes!
×