Mk4 golf gt tdi

[kevbridgend]

Has anyone ever had the cooling fan and low speed aircon fan run permanently after being switched of

Poss faulty temp sensor

Thanks in advance

[cuprabob]

Fan controller problems are one of the most common problems on MK4 Golfs. Unfortunately, the controller is within the fan so whole fan needs to be replaced.

Normal failure mode is no low speed fan when A/C is on with high speed pulsing in and out

[kevbridgend]

Cheers bob I'll look into that do they burn out or is it wiring/water ingress that causes it.

[cuprabob]

As far as I understand it they burn out. If you lose low speed there is a DIY fix to add an external resistor however yours are still running so that's not an option for you.

[kevbridgend]

Is the resistor on the n/s chassis leg

And is this what causes the fans to run on after the car is turned of

Cheers

[klimakool]

kevbridgend said:

Is the resistor on the n/s chassis leg

And is this what causes the fans to run on after the car is turned of

Cheers

yip, common fault