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 actuated motors under dash
Check for a vacuum leak either under the hood or under the dashCheck the vacuum actuators under the dashCheck the selector control Defrost is the default for this system
If the temperature cannot be changed for any of the direction settings, e.g., defrost, vents, floor, then the problem is very likely to be the blend door actuator motor.See "Related Questions" below for more
does fan door motorized or on a vaccuum line when you switch from AC to defrost?
That means either you have air in your heater core or your heater core is being bypassed
when it happened to mine, it was because the arm behind the dash that controls the internal vent doors slipped off
you probabally have a vacuum hose disconnected
When there is a problem in the vent system it defaults to defrost setting. Check the doors & vac supply
rear wiper, rear defrost
Your air mix door is stuck or broken.
The AC on a 1998 Dodge Ram 1998 will only be blowing out the defrost vent if the air handler is not set properly. This can result from a piece of debris getting stuck or a faulty flap.
The features for this microwave include one touch sensor cooking controls for chicken, fish, beverage, popcorn, potatoes, reheat and vegetables. You also have auto defrost, quick defrost and express cook settings.
you have a vac. leake or the oneway check valve is not working.....