Question about 1996 Audi A6

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Heat control problem,ac works sometimes

I have a 1996 audi a6 and the heater is unable to turn down,it says its turning down but doesnt.I can still adjust the flow of air though.And when I turn on the a/c it still blows out hot air .And the funny thing is somedays it works like it is supposed to,you know like when I take it in to get looked at!!Please help???

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When you turn key on heat runs all the time,could it be heat/ac control unit?

Posted on Sep 27, 2009


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Audi A6 2001 quattro 2.8 mysterious over heating

Yes, replace the thermostat. Then you need to 'burp the coolant system'. Your car has all the hallmarks of air in the system, especially a heater that is cold. This is because there is no water in the heater matrix. This is why it overheats. The system must be full and with no air to circulate correctly through the radiator.

Burping involves the following steps.

Remove the lid to the reservoir, remove the radiator cap, fill the radiator to the top, turn heating on full blast, start engine and get to operating temperature, keep topping up. Squeezing the radiator hoses helps. The level will rise and then drop when the thermostat opens. Top up when bubbles stop and the level becomes constant. Put radiator cap on, top up the reservoir and put the cap on that.

check the link

A6 2001 quattro 2 8L Google Search

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I have a 1998 audi a6 my windows wont go down my blower doesnt work for my ac and heat and my dome lights down work

sosounds like you should be chkg all your fuses in the fuse box. It only takes one to do this as they are often interconnected. cheers

Jul 18, 2012 | Audi A6 Cars & Trucks

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Make sure the blend door flap is traveling all the way to the open position when sliding dash control to heat position.

May 27, 2011 | 1996 Audi A6

1 Answer

The heater on my A6 1.8 petrol doesnt get warm just constantly blowing cold air,I've bled the cooling system recently had a new water pump and thermostat fitted and still no heat. the heater control unit...

There is a heater core valve on vehicles that have a dual zone, ( climate control ) systems. The valve is in the area of the heater core.

Something to try. allow the engine to run for 6 to 8 minutes with the heater wide open, then, turn the engine off and reach back and feel the 2 hoses at the firewall that lead to the heater core. If only 1 is hot you do have some blockage, if both are hot then it is circulating properly and your problem lies somewhere else.

Dual zone systems also have a split door between the heater core and a/c evaporator that often stops functioning properly and it can block the hot air comming from the core.

Jan 23, 2011 | 1996 Audi A4

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I get no heat from my audi A6 1997 car my blower works ,I changed thermostat and radiator still not working.

I had no heat after replacing the water pump on my 96 Audi A6 quattro. After reading the last post, I found a bleeder on one of the hoses going to the heater core. I just turned it and it allowed the air to escape. Then I had heat.

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My audi a6 keeps overheating at leat thats what the gauge tells me. It only happens when you are doing 40 or more . When you free wheel the temp shoots back down rapid. Any ideas

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1 Answer

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if its a climatronic head unit and there is a fault the head unit sometimes flashes to tell you there is a fault,diagnostic equipment should be able to pin point your problem

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