AC and Radiator Fan Not Working Overheating - HELP!

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Aug 9, 2006 | 12:17 PM

bluesxtreme

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Joined: Dec 2003

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AC and Radiator Fan Not Working Overheating - HELP!

Hi,

I have two problems that I desperately need help on for my 2003 Audi TT 1.8T.

I have two symptoms:
1) My A/C only works (blows really cold air) when I am driving and and using the gas pedal. When i stop or idle the AC turns off and is blowing hot/warm air.

2) My car is overheating after 5 minutes of driving. My HVAC readout shows a gradual climb from a temp of 80 to 121 and above. My radiator fans are also not coming on when I am in idle or when i stop the car.

I am frustrated to no end and am not sure if what it could be? Any suggestions? Should the fans be coming on while its in idle? I've searched all over the forums but seems like it could be a multitude of problems.

My cluster has recently been serviced by BBA-Reman for a high fuel guage and is already reinstalled. Shouldn't be a problem since i just got it fixed.

Aug 9, 2006 | 12:49 PM

Scenic Driver

AudiWorld Super User

Joined: Jun 2006

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Could be fan relays and/or thermostat

If you search this forum you will find postings from people that have had similar problems

Aug 9, 2006 | 12:50 PM

jackTTar

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Joined: Jan 2001

Posts: 2,323

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A/C possibility

check and make sure the R134A (freon) is fully charged. The A/C pressure sensor maybe detecting low pressure at engine idle.

Aug 9, 2006 | 01:25 PM

bluesxtreme

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Joined: Dec 2003

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Could it be fan control module?

Well I did search all over this forum for the past week or so:

1) fan control module?
2) AC pressure switch
3) fan radiator switch
4) a number of temp sensors? but i'm not sure which one.