defrost or a/c compartment under the dash
Check for vacuum leak either under hood or under dash Check for bad vacuum actuator under dash
Plugged evaporator? Check for a vacuum leak either under the hood or under the dash Check the operation of the vacuum actuators under the dash Check the operation of the selector switch
Check for vacuum leak either under hood or under dash Check the operation of the vacuum operated actuators under dash Check the operation of the selector switch
Check for a vacuum leak either under the hood or under the dash Check the operation of the vacuum actuators under the dash
Check for a vacuum leak either under the hood or under the dash Check the operation of the vacuum motors under dash Check the selector switch
Check for vacuum leak either under hood or under dash Check for bad vacuum actuator under dash Defrost is the default setting
Check for a vacuum leak either under hood or under dash or bad vacuum actuator under dash - defrost is the default setting for this model
Check for a vacuum leak either under dash or under the hood Check the operation of the vacuum actuated motors under dash Check the selector switch
Check for a vacuum leak either under the hood or under the dash Check the operation of the vacuum actuated motors under the dash Check the operation of the selector switch
Check for a vacuum leak either under hood or under dash Check for a bad vacuum actuated motor under dash Check selector switch
Perhaps a vacuum leak either under hood or under dash Perhaps vacuum booster unit check valve defective
Check for a vacuum leak either under the hood or under dash Check the operation of the vacuum actuated motors under dash Check the operation of the selector switch