Audi A6 The mid-sized Audi A6 model offers more room to the driver and passengers over the A4 line.

2003 A6 Heater issue

Old 10-26-2015, 05:03 PM
1st Gear
Thread Starter
Join Date: Jan 2013
Posts: 17
Default 2003 A6 Heater issue

I have a 2003 A6 that has developed a strange problem. Last year my heater worked perfectly but my A/C was not working. I fixed that problem with a new compressor and evap/dryer. All this summer the A/C has performed beautifully.

Now that fall has arrived I am starting to use the heater more. The only vent in the front of the car that blows warm air is the far right passenger dash vent. Everywhere else on the car it blows cold air.

This is really noticable when sitting at a stop sign. Once I get up to speed I start to get warm air from the other vents but not in any great quantity.

What should I be looking for with this. I really don't want to have to pull apart the entire dash to get to the heater core becasue I don't really think if one of my vents is blowing warm air that the heater core would be plugged..

help please
"shivering in Seattle"
Old 10-28-2015, 02:21 PM
ppgoal's Avatar
3rd Gear
Join Date: Sep 2006
Location: Holland MI
Posts: 2,660

I have erratic heat in my A6 if the temp is set in the low 70s. If I crank it up to HI, it seems to work. Not sure why, but I learn to live with it in Michigan (most of the time).
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