Does anyone have a solutions to No Heat in the Cabin.
Got a 2002 A4 Quatro Avant Wagon that does not get any heat in the cabin.
We've flushed the heater coil and is flowing fine.
We've change the thermostat. We've Checked the Water Pump.
Hose leading to heater element gets hot.
But there is no heat in the cabin and its the middle of the winter.
Yes, we've bleed the air out of the cooling system.
There is a slight to strong rubber smell sometimes?
Any ideas? Could it be a cabin temperature control unit or something?
At wits end.

 

Hi. A common problem is failure of the motors that activate the flaps on the heater box. In your case it would appear that the temp control flap is not moving, due to the temp control flap motor failing. Given that the heater pipe into cabin (from the engine bay) is hot then this would be the likely cause. This can be confirmed via a fault memory check on the climate control ecu (08) using a diagnostic tester. Hope this helps.

 

Thank you. That sounds logical. Do you know if the flap is reasonably accessible under the dash. Thus I could try to open the flap manually and see if that (temporarily) corrects the problem. This being the proposed problem also seems consistent with the "rubbery" smell.
I'll have at it. Thanks.

 

Hi weekend Mechanic.
The motors are fairly easily accessible. By removing the glovebox and drivers side under dash trim, you can see all the motors. You would need to first remove the temp flap motor before trying to move the flap, as they are connected via plastic gears meshed together (plastic gear of motor drives plastic gear of flap). If you try to force it you will prob break the mechanism. The motors are colour coded for different flaps. I'm in the u.k (RHD) so not sure if it differs abroad.