Rad fan running when engine running-cold?

[GT500]

Aye up fellas,
Just noticed, My RS2 rad fan runs all the time? had a search and not found a similar..

We are talking clap cold engine, air con off, start up, whirrrr, chuffin fan going!

Carn't be right?

FAn switch? mfts? climate fault?

Cheers,

Rob

[Chris M]

Could be the fan switch, cars at work do the same once they get moisture in the switches.

[Billman]

If you have the Aircon-Automatic switched on then the Fan runs with it all th etime.

[sal_s2]

On my lhd rs2 it does the same if the climate control is on, even if I've set the temp to max heat.

[MidnightBlueS2]

If you have the Aircon-Automatic switched on then the Fan runs with it all th etime.

AAHHAAA !!!! I'd always wondered why the rad fan would slowly spool if I turned on the auto heater/AC unit even when it was -10 degrees outside...

[GT500]

Yes i know it runs when the aircon pump is on ie auto pressed with snow flake on,
should the fan not stop when you turn the air con pump off,= auto on, flake off.

whats yours do?

Cheers,

Rob

[MidnightBlueS2]

Yes i know it runs when the aircon pump is on ie auto pressed with snow flake on,
should the fan not stop when you turn the air con pump off,= auto on, flake off.

whats yours do?

Cheers,

Rob

That's what I thought too but mine spools regardless if the A/C is turned on or off. I can't say for sure if it's normal or not but previous posts seem to indicate that it's normal...

[tim71]

Solution is quite simple - just disconnect the wire from pin 87b on afterrun control relay (447 965 571A under the dashboard) .

All other functionality will not be affected (fan afterrun, fan startup with A/C compressor etc.), only this annoying continuous running will be stopped.

Had done this myself on two ABY-engined cars.

P.S. This circuit is same in the RS2.

[GT500]

wow Tim, first post and you seem to know the beasts!
Welcome and thanks for the solution,

FAn runs no matter the setting to the climate control...
I will be trying the above.

Cheers,

Rob

[andyg plym]

re

had the same problem and turned out to be thermo switch on the bottom of the rad, it kept melting the fuse too as was on all the time

[andy112]

had the same problem when i bought mine, previous owner had fan changed and they didnt wire it right, had it rewired and it works fine.

[Billman]

Solution is quite simple - just disconnect the wire from pin 87b on afterrun control relay (447 965 571A under the dashboard) .

The question now is why does Audi installed this feature?