Heater issues
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From: Connecticut
Heater issues
2006 A4 S-line with a 2.0 fsi. This morning it was about 40 outside. I got in the car and drove with the heater on auto and hi. Drove the car for about 20 minutes and the temp gague was showing normal temp but the heater was blowing cold. Any thoughts?
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The Bentley Book of Audi lists four possible causes, all related to blocked or clogged hoses, heater core problems or defective ventilation control flaps. There is a fifth one not listed which is low coolant level in the system.
When was the last time you did any cooling system maintenance or repairs?
When was the last time you did any cooling system maintenance or repairs?
Last edited by Audishiva; Oct 15, 2015 at 07:48 PM.
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From: Connecticut
I just did the t-belt and waterpump a couple weeks ago. This was happening before that. I was told to check the core for clogs. I removed the 2 hoses and blew air through both the heater core (didn't seem to be a clog there) and the hoses.going into the core (also seemed to be clear). What it's doing is, when the car heats up, I can turn on the heat and it will blow hot. After a minute or two, it starts blowing cool. Like the coolant isn't going through the core very fast. But is still slowly going through.
The Bentley Book of Audi lists four possible causes, all related to blocked or clogged hoses, heater core problems or defective ventilation control flaps. There is a fifth one not listed which is low coolant level in the system.
When was the last time you did any cooling system maintenance or repairs?
When was the last time you did any cooling system maintenance or repairs?
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Audiworld Junior Member
Joined: Jul 2011
Posts: 47
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From: Connecticut
The temperature gauge is normal. It lands right in the middle of the gauge and stays there. It's almost like the coolant goes through the heater core, but very slowly. Weird.
Last edited by lumpydo; Oct 19, 2015 at 03:23 AM.
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From: Connecticut
Well, I'm not 100% sure I purged it properly. I don't know if there is a release valve or something. But I have kept an eye on the levels in the reserve tank. They did go down a bit and I topped it off. Since then the levels have been fine. I'll have to go.to you tube and see if there is a video on changing the t-stat.
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Thread Starter
Audiworld Junior Member
Joined: Jul 2011
Posts: 47
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From: Connecticut
Got it. Thanks. Checked it and its bled properly. Next, on the the stat.
On another note, I posted a question that no o e has answered yet. I have a torn front CV boot. Is there a way to replace that without having to replace the entire unit?
On another note, I posted a question that no o e has answered yet. I have a torn front CV boot. Is there a way to replace that without having to replace the entire unit?
Thread Starter
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From: Connecticut
Ok it is having a heating problem. The car will heat up fine while I'm driving, but at idle it starts to cool.down. I was told the core.may be getting clogged with sediment and to remove the heater core hoses, rinse the core out, fill it with CLR for 10-15 minutes, rinse a couple times.and re attach the hoses. The system has been bled. But it still does it. I had the car running and listened the cap on the overflow tank up, and it seemed to work ok again for a few minutes at idle. Once the pressure but back up, it started again. The t-belt and water pump were replaced in September with brand new oem equipment.