VW Touran's engine fans won't stop ?

[macspring]

Just wanted to ask on here, as it is my "home " forum. Not sure I'd get an answer as my first post on another forum.

Our VW Touran engine fans at the radiator won't turn off. Thought it was the thermo time switch, which apparently often go faulty, but still no joy after I installed a new one. Then thought it could be a relay that had "welded" itself in the "on" position. Pulled out each of the three relays, no change, pulled out each of the larger fuses, no change. All other fuses are working, i.e. not blown. Pulled off the electrical connection at the new thermo time switch and they still keep running.

Is the problem that I have to have a pal reset the fans using Vag-Com ? Car is an 04 and we are the original owners, never crashed or messed with.

Is there some sort of a contact inside the fan motors that could have heated itself shut in the on position ?

Any help would be appreciated as each time it has been driven for the last three weeks (waiting for the switch from the dealer, they go t in the wrong one first time), the battery has to be disconnected / reconnected. A right pita for my wife.

Any thoughts would be great.

Thanks.

[martinws]

Are you saying that even when you take the relay for the fan out and the fuse its still running?

[stocious]

is there a sensor in the bottom of the rad like in a s2? i had this happen to me recently and fixed it by tapping the sensor lightly!! . if this is any help to you idk but good luck!

[s2_wot]

Does switching the aircon on an off make any difference. Just a shot in the dark but could it be hardwired to the aircon someway.

[macspring]

There is only about 3 or 4 relays in the fusebox in the engine bay, and the fans keep going regardless of me taking out any of the relays.

Checked the a/c idea, and with the a/c turned off, the fans still run.

Any more ideas please ?

Thanks.

[stocious]

short of some sort.. getting power elsewhere. if youve removed fuse and relays and it still works..

[Sleeper_Avant]

coolant temp sensor or, most probably cause........... the fan controller, plug it in first though

its on the fan cowling (last one i priced was only available with the fans, £180 ish from TPS)
[img]http://www.justanswer.com/uploads/RIP180OUT/2008-02-18_195704_coolant_fan.jpg[img]

[Sleeper_Avant]