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No hot air blowing in my 2003 Audi A4

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Old 11-24-2008, 10:22 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, 10:46 AM
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Default Temperature flaps?

Check for codes in the HVAC module to confirm.
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Old 11-24-2008, 11:15 AM
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tried it on HI and ECON?
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Old 11-24-2008, 11:51 AM
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is it overheating as well?
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Old 11-24-2008, 12:34 PM
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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, 01:54 PM
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Default Is your heater core warm/hot? If so...

the internal flaps which direct airflow over and or around the heater core, may have one of their electric motors gone bad...

One of my previous posts-<ul><li><a href="https://forums.audiworld.com/a4gen2/msgs/1085220.phtml">https://forums.audiworld.com/a4gen2/msgs/1085220.phtml</a</li></ul>
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Old 11-24-2008, 02:10 PM
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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 11-24-2008, 11:31 PM
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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, 05:23 AM
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flushed the heater core, it fixed a friends 02 A4 that only blew cold air.
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Old 11-25-2008, 04:05 PM
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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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