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Where is the actuator door on GMC Sierra truck heater and why does it not open close for the defroster?
This is under the dash and just to the right of your gas peddle.
Why does your Dodge van only blow heat out the defroster?
Either you have clogged or busted vent pipe or the actuator could be going bad.
Only the front windshield air comes on not the vents for a 1999 Dodge Intrepid can you tell me why?
Defroster actuator lost vacuume[manual control] or locked up[electronic ATC]....
Can a vacuum leak cause a blend door to not work?
Most temp blend doors have an electric actuator. The defroster, dash vents and floor vents are usually run by vacuum.
Blows out cold air threw defroster but not the ac vents?
Check for vacuum leak either under hood or under dash Check for bad vacuum actuator under dash Defrost is the default setting
Why is vent not switching from heater to defroster to bi level on Buick skylark?
It depends on the year of the Buick. Most of the newer Buicks use an electric actuator to change the vent door positions. If that's the case with yours you have a problem with wiring or a faulty actuator or switch. If yours is one of the vacuum controled heater boxes you probably have a leaky vacuum line or diaphragm.
What is a mode door on a 2000 Dodge Intrepid?
I think your refering to the door in the heater housing that directs air to vents, floor or defroster vents, there is also a blend actuator that mixes heated or cooled air to give the correct temperature from the selector.
Why is Car is purring when defroster is turned on?
It is probably the sound of the defroster fan.
The drivers side back window has a defroster but the pass side does not have a defroster is that normal?
What your seeing is the cars radio antenna. Your defroster is on your back window.
Rear window defroster?
what are the colors of the wires for the rear window defroster coming from the rear window to the defroster bottom ? can any body help me
Why does your rear window defroster not work even though the light say its on in a 2005 BMW 525?
There can be several reasons a rear defroster fails even when the light on the defroster switch indicates it is on. The most likely reason is that one of the metal defroster tabs along the side of the back window has separated from the defroster. If the defroster tabs check out as still attached to the defroster then you need to do a little checking with a volt meter. The first thing to check is the voltage directly on the tabs themselves. This should be around 12-14 volts. If the voltage is zero then there is very likely a broken wire someplace between the defroster relay and the defroster. If you have 12-14 volts a the defroster tabs then there is something going on with the grid which is normally broken defroster elements, those long thin horizontal lines on the back window.
How did the air stop blowing out the vents in your Bonneville but only blows out the windshield defroster?
you may have whats known as a mode actuator door going bad (the thing that changes direction of the blower motor vent) there are several parts in that system so to be sure it will have to be disassembled and inspected
