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2005 Audi A4, heater is blowing cold air - 2005 Audi A4

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Recently had the same problem with my Audi A4, it was the engine thermostat needed replacing, now working fine

Posted on Feb 21, 2010

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Posted on Jan 02, 2017

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chalkymon
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SOURCE: 96 audi a4 heater blows cold air

Are you sure the thermostat is working efficiently? If your getting a little heat when the car is idleing in traffic, but this goes when you start driving again, it suggests the t'stat is stuck open, therefore no temperature can build. When you flushed the system, could you confirm the flow of water through the heater radiator? Was it passing through easily or just a dribble on the point of exit? is there any heat delivered from any of the other heater settings, e.g floor/screen/face vents? If you can get heat from one of these positions it may suggest a heater box issue. There is of course a slim possiblity that the impeller on the engine water pump may have become loose and ineffective. See how you get on. Good luck

Posted on Jan 17, 2009

  • 32 Answers

SOURCE: My audi a4 is blowing out cold air even when the

heater core clogged or heater valve

Posted on Jan 07, 2010

SOURCE: 1997 audi A4 heater blowing cold air

untill the system is bleed corectly at idle speen you will get cold air continually

Posted on Oct 19, 2008

  • 45 Answers

SOURCE: 1997 audi A4 heater blowing cold air

You will have to change the heater core. 9 out of 10 times, when the heater is not heating the air, it is a bad heater core.

Posted on Nov 13, 2008

emjem74
  • 162 Answers

SOURCE: we have an audi a4 2.6cc , the heater only blows

sounds like the thermostat is not functioning correctly? either that or not in at all? thus making the water which would normally warm up quickly, warm up extremely slowly and on really cold days not at all? with a 2.6 engine your car shoudl warm up in record time?

Posted on Mar 04, 2009

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We have an audi a4 2.6cc , the heater only blows cold air we have had a new heater matrix a new water pump and thermostat and a new radiator now it blow luke warm air but not hot,please any ideas


sounds like the thermostat is not functioning correctly? either that or not in at all? thus making the water which would normally warm up quickly, warm up extremely slowly and on really cold days not at all? with a 2.6 engine your car shoudl warm up in record time?

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3 Answers

96 audi a4 blowing cold air


yes, very possible. but first check your fluid level, thermostat.

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1 Answer

1997 audi A4 heater blowing cold air


You will have to change the heater core. 9 out of 10 times, when the heater is not heating the air, it is a bad heater core.

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