Need Help...!!! Radiator fan not working.....

[sidman]

Can anyone help me..? My mk4 Golf GTI T started overheating last night. So i eventually got it home and today bought a new thermostat and temp sender. I put both parts on but the fan still doesnt come on...!!!!

Ive only had the car a few weeks and starting to lose faith in it......PLEASE HELP?

Or does anyone know a reliable mobile mechanic in the Romford area...?

[sidman]

ive just taken a fuse out of the fuse box and both fans run constantly. It was a 10amp fuse that was top left, 2nd in. Does anyone know what this means...?

[sidman]

To add to my confusion...i got to work this morning (i only work 15 minutes from where I live so the car doesnt overheat in that distance) and the fans were going....so i left the engine running and the car still overheated.......Im starting to think it is the dreaded head gasket.....but please someone help me and give me some advise.... :-(

[Wazzzer]

do you get water running back into the header tank via the small top pipe when it's warm?

[sidman]

yes I do so I know the water pump is working.......

ive done a bit more research and im gonna test the fans today to see if they run at both speeds....and im leaning towards the fan module now

[turbokid23]

Sound a bit mad but have you thought about your thermostat?

[sidman]

ive replaced the thermostat and the temp sender...

Just had a diagnostic tool come in the post today and its throwing up error code 16501 which is the temp sender that i have replaced....im gonna take the pipe off for the water pump return to the reservoir and see if the water is pumping through......this one has stumped me

[barrym381]

you might get some water comin through the return even if the waterpump is f**ked

[Wazzzer]

you got climate or just air con? Genuine temp sender?

[sidman]

ive got climate control and i got the temp sender from VW so it is genuine part...

Are there any other tests i can do to see if the water pump has had it...?