Question about Cars & Trucks

1 Answer

Audi a4 heater

The heater blows cold air and the car does not over heat. what parts do i need to replace?

Posted by on


1 Answer

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points


    An expert that got 20 achievements.


    An expert that got 10 achievements.


    An expert that got 5 achievements.

  • Cars & Trucks Master
  • 2,361 Answers

If the coolant and thermostat is over 2 year old then it is time to replace thermostat and coolant flush to get all the deposit out.

Flush and fill the coolant reserve tank slowly. I recommend put the car on an oil change ramp to prevent air pocket.

Posted on Jan 20, 2014


6 Suggested Answers

  • 2 Answers


Hi there,
Save hours of searching online or wasting money on unnecessary repairs by talking to a 6YA Expert who can help you resolve this issue over the phone in a minute or two.

Best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.

Here's a link to this great service

Good luck!

Posted on Jan 02, 2017

  • 1586 Answers

SOURCE: 1997 audi A4 heater blowing cold air

Sounds like one of two things has happened - either the heater core has gone south or your thermostat is stuck wide open. The t-stat is more likely as the A4 is known for issues such as this. My 99 A4 currently has the t-stat stuck partially open, so my heat production isn't quite what it should be. I did a timing belt on a 30v Passat a few weeks ago (same engine that I have) and it had the same condition as my car. Once the new thermostat was in, you could set the temperature to 75 degrees with the heat on the floor vents, and cook hamburgers on the floor mats.

Change your thermostat and you should be good to go. I don't know if you have the 1.8T or the 2.8 V6, but if you have the 1.8T, go to or and look in their tech procedures - there's a photo-referenced step by step on how to do it on the 1.8T. For the 2.8 V6, you have to open the car's front end as if you were doing a timing belt - the thermostat is behind the belt. You don't have to remove the timing belt to remove the thermostat, but if you're going that far in, and you haven't just recently done the timing belt service, you might as well spend the money and do it now rather than pay all that labor again later.

If you're in northern PA or southern NY and want to take a drive, I can do the work for you in an afternoon - otherwise, find a local shop that specializes in european cars and have them do it - it'll be a few hundred dollars less than if a dealer does it, and they'll do the job very well. Don't just go to any old shop - guys that wrench on Chevys all the time aren't the ones you want working on an Audi. They're good mechanics but there are things about the Audi that they likely aren't going to know to do.

If you do the work yourself and you want some pointers on it (it really is an easy job), reply here with an email address and I'll email you and talk you through it. You will need to pick up 3 liters of G12 coolant though (the pink stuff) from a dealership, or order it from (midwest), (west coast), or (east coast). AutoZone doesn't sell it so you'll have to source it yourself. Those companies also sell the thermostat as well as kits with the timing belt service parts, so you can order that stuff from them as well. And if you do that, don't spend the extra $170 for the cam locking tools - they're 100% unnecessary.

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

  • 324 Answers

SOURCE: heater doesn't work

your heater core went bad, you need to replace the heater core....

Posted on Nov 26, 2008

  • 651 Answers

SOURCE: 96 audi a4 blowing cold air

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

Posted on Dec 06, 2008

  • 1 Answer

SOURCE: 96 audi a4 heater blows cold air

you have air in the system!! you have to unbolt the filler tank and lift it 5 inch higer first. then loose the right hose on the heater core( this hose have and hole to bleed the system) and then put antifreeze until the antifreeze will go out of the hole then re install the hose to the heater core, then ajust the level correcty
have fun

Posted on Feb 05, 2009

Add Your Answer

Uploading: 0%


Complete. Click "Add" to insert your video. Add



Related Questions:

1 Answer

2005 Audi A4, heater is blowing cold air

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

Feb 03, 2010 | 2005 Audi A4

1 Answer

My audi a4 is blowing out cold air even when the

heater core clogged or heater valve

Jan 07, 2010 | 1998 Audi A4

1 Answer

2002 audi a4 1.8t heat problem.

most likely a air bubble in your system. get it up to temp open up your reservoir use something that will fit in the opening and put coolant into it rev engine up a bit until you see bubbles coming up. when you did the engine did you replace cooling system parts like t-stat or water pump? purging the system of air will take a little while good luck hope that helps

Sep 04, 2009 | 2002 Audi A4

1 Answer

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?

Mar 04, 2009 | 1998 Audi A4

1 Answer

Only cold air coming through heater on 1996 audi a4

I have read on an audi forums sitethat sometimes air gets stuck in heater core and can cause the problems you are experiencing. You need to get the coolant bleed. Easiest way would be to go get it flushed by one of those flushing machines. Hope this helps. I found solution at

Feb 28, 2009 | 1996 Audi A4

2 Answers

1997 audi A4 heater blowing cold air

You probably have a leak in your oil cooler. This is causing the oil to bleed into your cooling system causing the "thick brown liquid". This in turn will also cause your engine to over-heat since the cooling system is contaminated.

Feb 25, 2009 | 1997 Audi A4

3 Answers

96 audi a4 blowing cold air

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

Dec 06, 2008 | 1997 Audi A4

1 Answer

Heater doesn't work

your heater core went bad, you need to replace the heater core....

Nov 24, 2008 | 2001 Audi A4

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.

Nov 12, 2008 | 1998 Audi A4

Not finding what you are looking for?
Cars & Trucks Logo

Related Topics:

81 people viewed this question

Ask a Question

Usually answered in minutes!

Top Cars & Trucks Experts


Level 3 Expert

85206 Answers

Colin Stickland
Colin Stickland

Level 3 Expert

22484 Answers

john h

Level 3 Expert

22408 Answers

Are you a Car and Truck Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides