TT (Mk1) Discussion Discussion forum for the Mk1 Audi TT Coupe & Roadster produced from 2000-2006

Radiator Fan Operation - Questions

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Old Feb 16, 2008 | 08:05 AM
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coasTTal's Avatar
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Default Radiator Fan Operation - Questions

Trying to diagnose my radiator fan problem and have a few questions:

a) When the TT overheats, does only the one (right most facing the TT) fan come on?
I know when autocrossing and the TT overheats, it will only cool down when I turn on the AC, which apparently controls the 2nd fan.

b) Is the A/C disabled below a certain outside temp.?

c) Is the 2nd fan interlocked such that it will only run when the 1st fan is already running?

d) Where is the fan controller?
TIA, John
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Old Feb 16, 2008 | 09:04 AM
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Default No - both fans come on at slow speed at first then ...

high speed at higher temp - controlled by the fan thermal switch in the radiator. The a/c will start BOTH fans in high speed. The fan controller module is underneatyh the battery.
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