W245 B170 Radiator Fan staying on

[lukem]

Hi folks.
The radiator fan of my B170 is now permanently running, which has been the same for the last week or so. Doesn't matter if engine is cold or hot.

I've checked fuses - look OK, I've re-earthed the wires I can see, I've cleaned and WD40'd the large blue fan plug and pushed and prodded other bits. Coolant looks OK although I'll recheck this tonight when I have access to the car.

Any ideas?

Thanks for any help!

 

[lukem]

er...this is not solved. and can't see how to edit OP. computer at work is painfully slow. help? mods?

 

[npuk]

Click thread tools button > mark thread as unsolved.

Could be a faulty thermostat? Get the car put on STAR.

 

[lukem]

i can get that checked. had assumed it wasn't as it's warming up as normal and maintaining it's normal steady temperature. anything else?