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Cooling fans stop running when A/C is off

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Old 11-25-2014, 10:05 AM
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JV928
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Default Cooling fans stop running when A/C is off

My 88 S4 has had various issues this year, as soon as one thing is fixed it's another. My latest issue, the cooling fans will only run when the A/C is on. My mechanic, while installing a new radiator and running the car to make sure it works then noticed that the cooling fans won't turn on unless the A/C is turn on, well, it's winter and I wouldn't need the A/C right now so thus, no A/C no cooling fan thus the car temp gets high.

Any suggestions?

Thanks,
Texas
Old 11-25-2014, 10:44 AM
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Alan
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Check the connections to (and/or replace) the temperature sending unit located on the on the water bridge - there are 2 senders there - you want the drivers side one - Green & Green/Red wires.

Alan
Old 11-25-2014, 08:52 PM
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RFJ
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great to have people like alan around!

Last edited by RFJ; 11-25-2014 at 08:52 PM. Reason: can't spell
Old 11-26-2014, 01:55 AM
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JV928
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Originally Posted by Alan
Check the connections to (and/or replace) the temperature sending unit located on the on the water bridge - there are 2 senders there - you want the drivers side one - Green & Green/Red wires.

Alan
Thanks Alan, I'll pass it along to my mechanic. The water pump was replace also and he is flushing the radiator and transmission to make sure there isn't any water inside either. Do you have a picture showing the temp sending unit? Thanks.
Old 11-26-2014, 11:00 AM
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Alan
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Try this :

http://members.rennlist.com/v1uhoh/underthe.htm

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Alan
Old 11-26-2014, 05:17 PM
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JV928
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Thanks Alan, I pass it along.



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