You probably have an electronic air cleaner. That's a GOOD thing. The electronic air cleaners do a remarkable job of removing dust and pollen from the air. The filter needs to be cleaned occasionally but you should refer to the owners manual to make certain that you don't damage it. They are expensive to replace.
I'm having the same problem with my 2003 Tahoe. At first it was just the clicking and within a month the dash vents stopped working. Now it only blows through the defrost vents. From what I have read and heard from a couple of mechanics it is a bad a/c mode door actuator. Dealer charges somewhere between $700 and $1,000. I've read that to do it yourself it requires a special tool.
because when you first turn it on, hot air blows from it... thats just how it works, then after a while cool air comes
actuator under center of dash is bad
The magma gushes out and then it flows every where. The volcano has vents that let air come out. When the vents open steam/ smoke comes out of those vents.
shut all vents off so it comes out on floor
i have recently encountered this on my 2002 GMC Envoy. After removing many of the underdash parts, ie, shroud under the dashboard, and some of the plastic vent ducts i identified the source of the sound. There are three separate actuator motors that help to control which vents the air comes out of, ie defroster, dashboard vents, or foot vents or some combination therof. One of the actuator motors is causing the clicking sound. Unfortuantely, you can only change the lower actuator motor from the bottom, the other two SEEM to have to be accessed by removing the dashboard and/or center control panel. I am currently researching this to perform the repair myself, because a trip to the dealer is certainly not going to be inexpensive.
It's the blend door on the HVAC box. It's what controls what temp air comes through the vents.
you need to replace the vacuum.
Sounds like vents are in open position where it passes through based on speed with or without fan on
Well first of all.. You want heat in your house when it's cold, RIGHT? So you turn on the heater with the knob.. and the heat comes out of the vents. No vents = explosion. And basically.. no vents as I said.. explosion, because the gas has nowhere to go so the pressure will build up and BOOM.. flames.
my 2000 Chevy venture van the air comes hot by drivers vet and cool by passenger vents
there is a actuator that moves the tempature blend door,the door that controls hot to cold.the gears in the motor are plastic.is it makes a clicking noise after you turn the heater on ,it broke answer a flapping sound is usually caused by a leaf or other matter falling down thru vents pull fan cover off and clean debis out, mostdoors are are controlled by cable or vacuum,not gears.as you didnt say a clicking sound i doubt very much it has anything to do with motor or gears
It is more then likely your heater core. is it fogging up in your vehicle?
The motor which blows air through the vents.
The first thing to check is the relay. It is like a fuse. A parts store might help you do this. If the temperature became worse and worse a little at a time then you may have a refrigerant leak. but check the relay first.
It is Likely a vacuum leak under dash leading to vents
The duct probably fell off
There is a door that diverts the air from the floor to the roof vents. It is controlled with a plastic gear and arm. The gear has stripped out and needs replaced. It's a $35 part but it takes a few hours of labor to replace it because you have to remove so much of the interior to get to it.
Return air vents.........
With either gable vents, soffit vents or ridge vents. The more the better
Vents should be cross ventilated in homes. This is an example sentence for vents.
The most likely reason is your AC system needs recharged.
Check at the back of the intake manifold for any broken vacuum hoses.