NO HEATER on A6
11-22-2011, 01:06 PM
#11
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With the plastic tray removed from in front of the wipers, you can see several of the lingage arms and flap motors.
There is one flap motor in the big round duct that connects the A/C evaporator to the heater box. Note the squarish box on top of the round duct. That controls a round door inside that looks like a throttle plate. You can move the rubber boot back a bit and watch it work.
<img src="http://pictureposter.audiworld.com/57225/evaporator_resized.jpg">
There is also a flap motor inside a box there above the vacuum actuated heater valve. Unscrew the cover of the housing and then you can watch it work. (sorry, I don't have a photo of it)
On the passenger side of the heater box there is some linkage you can watch working.
<img src="http://pictureposter.audiworld.com/57225/heater_box_resized.jpg">
In the next picture I've labeled where I think the heater flap is and if you look on the plastic housing, you can see the arc molded into the housing where the flap swings. When the flap is up, it makes the air from the blower go downward, through the heater core (who's tall rectangular outline you can see vertically there at the bottom middle of the heater box) and then into the car. When the flap is down, air is blocked from going downward through the heater core, and so just old air comes into the car. Of course this flap can be in any position as the climate control computer "blends" cold air from outside with some air going through the heater core to provide whatever tempurature you've asked for.
<img src="http://pictureposter.audiworld.com/57225/heater_box_heater_flap_diagram.jpg">
Anyway, point being that I think the flap motor you're after is the one located in the box next to the vacuum actuated heater valve. As such, it should be real easy to pop out, clean up and get working.
This is where VAG-Com and the "output diagnostic test mode" comes in handy because you can actuate each of these motors and then stand there and watch them work (or not).
The climate control unit can do a self diagnostic and show you it's own fault codes. I think there's a page on how to do this on 12v.org or similar.
There is one flap motor in the big round duct that connects the A/C evaporator to the heater box. Note the squarish box on top of the round duct. That controls a round door inside that looks like a throttle plate. You can move the rubber boot back a bit and watch it work.
<img src="http://pictureposter.audiworld.com/57225/evaporator_resized.jpg">
There is also a flap motor inside a box there above the vacuum actuated heater valve. Unscrew the cover of the housing and then you can watch it work. (sorry, I don't have a photo of it)
On the passenger side of the heater box there is some linkage you can watch working.
<img src="http://pictureposter.audiworld.com/57225/heater_box_resized.jpg">
In the next picture I've labeled where I think the heater flap is and if you look on the plastic housing, you can see the arc molded into the housing where the flap swings. When the flap is up, it makes the air from the blower go downward, through the heater core (who's tall rectangular outline you can see vertically there at the bottom middle of the heater box) and then into the car. When the flap is down, air is blocked from going downward through the heater core, and so just old air comes into the car. Of course this flap can be in any position as the climate control computer "blends" cold air from outside with some air going through the heater core to provide whatever tempurature you've asked for.
<img src="http://pictureposter.audiworld.com/57225/heater_box_heater_flap_diagram.jpg">
Anyway, point being that I think the flap motor you're after is the one located in the box next to the vacuum actuated heater valve. As such, it should be real easy to pop out, clean up and get working.
This is where VAG-Com and the "output diagnostic test mode" comes in handy because you can actuate each of these motors and then stand there and watch them work (or not).
The climate control unit can do a self diagnostic and show you it's own fault codes. I think there's a page on how to do this on 12v.org or similar.
I know this a really old post, but I ran into this issue and had a question. The red/blue illistration looks like it goes counterclockwise to open and the position it's in, in the pic is closed?
On mine it only would move counter clockwise from that position(in the pic).
Anyway I wanted to know too if the 2 arms are 2 flaps or if one of them was a flap and the other is a motor? The one on the right the motor and the one on the left the flap? maybe?
11-22-2011, 01:12 PM
#12
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I don't see an edit button, but I meant to say the illistraion is incorrect I think? I don't think it moves clockwise from that position in the pic. Can anyone confirm that?
Also, are there 2 flaps there(on the other side of each arm) or is one a flap and the other a motor?
Also, are there 2 flaps there(on the other side of each arm) or is one a flap and the other a motor?
10-27-2012, 04:16 PM
#13
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With the plastic tray removed from in front of the wipers, you can see several of the lingage arms and flap motors.
There is one flap motor in the big round duct that connects the A/C evaporator to the heater box. Note the squarish box on top of the round duct. That controls a round door inside that looks like a throttle plate. You can move the rubber boot back a bit and watch it work.
<img src="http://pictureposter.audiworld.com/57225/evaporator_resized.jpg">
There is also a flap motor inside a box there above the vacuum actuated heater valve. Unscrew the cover of the housing and then you can watch it work. (sorry, I don't have a photo of it)
On the passenger side of the heater box there is some linkage you can watch working.
<img src="http://pictureposter.audiworld.com/57225/heater_box_resized.jpg">
In the next picture I've labeled where I think the heater flap is and if you look on the plastic housing, you can see the arc molded into the housing where the flap swings. When the flap is up, it makes the air from the blower go downward, through the heater core (who's tall rectangular outline you can see vertically there at the bottom middle of the heater box) and then into the car. When the flap is down, air is blocked from going downward through the heater core, and so just old air comes into the car. Of course this flap can be in any position as the climate control computer "blends" cold air from outside with some air going through the heater core to provide whatever tempurature you've asked for.
<img src="http://pictureposter.audiworld.com/57225/heater_box_heater_flap_diagram.jpg">
Anyway, point being that I think the flap motor you're after is the one located in the box next to the vacuum actuated heater valve. As such, it should be real easy to pop out, clean up and get working.
This is where VAG-Com and the "output diagnostic test mode" comes in handy because you can actuate each of these motors and then stand there and watch them work (or not).
The climate control unit can do a self diagnostic and show you it's own fault codes. I think there's a page on how to do this on 12v.org or similar.
There is one flap motor in the big round duct that connects the A/C evaporator to the heater box. Note the squarish box on top of the round duct. That controls a round door inside that looks like a throttle plate. You can move the rubber boot back a bit and watch it work.
<img src="http://pictureposter.audiworld.com/57225/evaporator_resized.jpg">
There is also a flap motor inside a box there above the vacuum actuated heater valve. Unscrew the cover of the housing and then you can watch it work. (sorry, I don't have a photo of it)
On the passenger side of the heater box there is some linkage you can watch working.
<img src="http://pictureposter.audiworld.com/57225/heater_box_resized.jpg">
In the next picture I've labeled where I think the heater flap is and if you look on the plastic housing, you can see the arc molded into the housing where the flap swings. When the flap is up, it makes the air from the blower go downward, through the heater core (who's tall rectangular outline you can see vertically there at the bottom middle of the heater box) and then into the car. When the flap is down, air is blocked from going downward through the heater core, and so just old air comes into the car. Of course this flap can be in any position as the climate control computer "blends" cold air from outside with some air going through the heater core to provide whatever tempurature you've asked for.
<img src="http://pictureposter.audiworld.com/57225/heater_box_heater_flap_diagram.jpg">
Anyway, point being that I think the flap motor you're after is the one located in the box next to the vacuum actuated heater valve. As such, it should be real easy to pop out, clean up and get working.
This is where VAG-Com and the "output diagnostic test mode" comes in handy because you can actuate each of these motors and then stand there and watch them work (or not).
The climate control unit can do a self diagnostic and show you it's own fault codes. I think there's a page on how to do this on 12v.org or similar.
10/27/12:
Here was my situtation, Nice warm hoses, both of them, but no heat in the car.
So... I went from the pic with the fan, and the annotation of the levers, up/down on the blender. You know the core is heating, otherwise only one hose would be warm, the other cool or cold. Mine wer NICE and Hot. Here's what I did:
Took the wiper motor out, (big 13mm nut on wiper motor, and removed the 3 10mm bolts holding the motor on the bracket. Then moved the motor away, allowing me access to the small screws holding the blender motor on the opposite side (drivers side next to wiper motor) of the levers (pic with the levers w/blue and red lines etc). Then removed the small screws for the blender motor cover, and removed the blender motor... be VERY CAREFUL, as you can bust the plastic levers on the motor. Now you can manually move the blender motor flap. Voualla... HEAT !!!
For now, I will just leave it in the heat position, letting the heat be regulated by the valve/temp controller. At least she heats !
02-05-2023, 07:45 AM
#15
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Hello, I have a problem with the Audi A6 4F 3.0 that when I drive the car slowly, it only blows cold air, but on the other hand, when I drive on a motorway at 130 km/h, the hot air starts, but I cleaned the heating valve, but it still does the same thing, has anyone had it? like this? Thanks
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