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Old 11-24-2008, 11:22 AM   #1
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Default No hot air blowing in my 2003 Audi A4

I have a 2003 Audi A4 and my heater is not blowing hot air. It only blows cold air; even though, the heat gauge is normal (1/2).
Does any body have any suggestions as to what this might be? Thank.
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Old 11-24-2008, 11:46 AM   #2
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Default Temperature flaps?

Check for codes in the HVAC module to confirm.
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Old 11-24-2008, 12:15 PM   #3
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Default tried it on HI and ECON?

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Old 11-24-2008, 12:51 PM   #4
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Default is it overheating as well?

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Old 11-24-2008, 01:34 PM   #5
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Default Re: is it overheating as well?

No, it is not overheating. It works and blows fine as if it was working normal, but it just doesn't blow any hot air. I almost seem like it is something with the coil switch not working, but how would I go about fixing that.
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Old 11-24-2008, 03:10 PM   #7
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Default use vag-com to find any codes, and i'd personally bleed the system a bit through the top screw

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Old 11-25-2008, 12:31 AM   #8
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Default how many miles? timing belt/ water pump ever replaced?

the water pump impeller from the factory is plastic, which is mounted on a metal shaft and can separate from the shaft. Keep us posted on what you find out.
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Old 11-25-2008, 06:23 AM   #9
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Default flushed the heater core, it fixed a friends 02 A4 that only blew cold air.

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Old 11-25-2008, 05:05 PM   #10
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Default How do you flush just a heater core?

Are you talking about the entire system? Thought they were connected.
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Old 11-25-2008, 05:05 PM
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18t, 1997, 2001, 2002, 2003, a4, air, audi, blowing, blows, cold, core, flush, heater, hot


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