The air conditioner for my 1998 4 cyl Accord will only work only in defrost mode, and blows out cold air. As soon as I hit the button for any other mode (defrost and vents, vents, floor) the air conditionling light turns off and it just blows outside temperature air. Does anyone know what may be causing this? Thanks
SOURCE: 1998 Mustang - AC blows only through Defrost vents
You probably have a vacuum leak on the passenger side. its a small plastic hose some times they come unpluged from the engine. or brake.
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: Dash vents will not blow air. Defroster and floor vents blow fine.
Is it a new vehicle? I had a new vehicle that had the same problem. Answer was that the holes weren't punched out of the vent.
SOURCE: Jeep AC blows cold air at defrost and feet but not through vents
There is a flap that directs the air. the flap is controlled by a vacuum actuator. This is located inside the venting. The actuator is connected to little vacuum hoses that attach to the temperature control switch. Either the flap is stuck, or the actuator has gone bad.
SOURCE: 1998 Malibu 6 cyl. Air conditioner works fine -
There is a temp door actuator motor that is not working,it is on top of the blower box,where it is mounted,the dash will have to be removed to replace the actuator motor.If this was at all helpful,please rate,thank you.
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