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Chris Milner
Tinkerer
qld
tt

Posts: 47
Reg: 09-2008

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 Sunday, August 23, 2009 - 08:50 pm, by:  Chris Milner (Milnuts) Quote hilighted text Edit Post Delete Post Print Post   View Post/Check IP (Moderator/Admin Only) Move Post (Moderator/Admin Only)
just wondering what it means when the aux air con fan keeps kicking in mainly in stop start traffic, never used to hear it until about two weeks ago. Ive flushed the coolant and put new distilled water and motorsport coolant in but still happening. Does it kick in when my auto gets hot? It is shift kitted with the line pressure up, car is not overheating. Thanks for your ideas.
Austen Menze
Tinkerer
WA
TT

Posts: 15
Reg: 07-2009

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 Sunday, August 23, 2009 - 09:23 pm, by:  Austen Menze (Mercyfulfate) Quote hilighted text Edit Post Delete Post Print Post   View Post/Check IP (Moderator/Admin Only) Move Post (Moderator/Admin Only)
The aircon fan kicks on and off, thats normal. The bearings may be worn though and thats why you can hear it.
Scott Wilkes
DieHard
Tasmania
92 TT Factory Manual

Posts: 873
Reg: 10-2008

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 Sunday, August 23, 2009 - 09:37 pm, by:  Scott Wilkes (Scottywilkes) Quote hilighted text Edit Post Delete Post Print Post   View Post/Check IP (Moderator/Admin Only) Move Post (Moderator/Admin Only)
its normal mate, in traffic you dont have a constant flow of air over the radiator to cool it.

The fan is hooked into a thermotin switch which when a certain temp is reached (say 90degrees) contacts within the switch will close and turn on the fan, when the temp of the coolant drops below say 90 degrees the contacts open and the fan turns off. Pretty simple :-)

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