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Audi 100, S4: 1992-1994, A6, S6: 1995-1997 (C4) A6 2.8Q 1996 Acc does not send hot air into the coupe of the car.


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Last Post: Oct 18, 2012 2:44 AM Last Post By: smokerider49
smokerider49

Posts: 2
Registered: 10/17/10
A6 2.8Q 1996 Acc does not send hot air into the coupe of the car.
Posted: Oct 17, 2012 4:38 AM
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Hi all, I have just bought a 1996 A6 2.8Q sedan in mint condition. There is only one problem.
When in Auto on the ACC control, the fan blows hard, but no hot air enter through the air vents into the coupe. I have heard that it possibly coulf be due to some flap in the ventilation system that doesnot open.
I hope anyone here coulf tell me of experiences with similar problems. The defroster air comes out normally.
budpalumbo

Posts: 1,456
Registered: 12/09/03
Re: A6 2.8Q 1996 Acc does not send hot air into the coupe of the car.
Posted: Oct 17, 2012 11:56 AM   in response to: smokerider49 in response to: smokerider49
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Is the defrost the only thing that works? Or does it actually blow out of the defrost and floor on heat, maybe the end vents, but not the center on heat? European cars won't blow hot air out of the center vent on auto, hot air in your face makes you tired and tired drivers fall asleep. If only defrost works, then the issue is probably in the vacuum system (probably a line under the hood) not providing to the control head.
smokerider49

Posts: 2
Registered: 10/17/10
Re: A6 2.8Q 1996 Acc does not send hot air into the coupe of the car.
Posted: Oct 18, 2012 2:44 AM   in response to: budpalumbo in response to: budpalumbo
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Hi, and thanks for you quick reply, well I went a local garage yesterday, they connected the VCDS by computer, error was detected in heat regulator switch, bad earth connection, or malfunction.
The guy reset the switch by software, and that made the air to start entering the car again.
All seemed well, but after some minutes of driving the engine gets normal temperature, but with ACC set on 22 degrees C, the fan continues to blow hard, and no hot air comes into the coupe of the car.
In Norway now we have just 4-5 degrees outside, so the heating is nice to have.
Any ideas ? Do I need to replace this switch, or maybe the heat core is the problem ?
Does anyone know where this switch is located on the car ? I do not want to disassemble the complete heating system before I know exactly what's causing the missing hot air....

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