Radiator switch?

[Andybrad11]

Hi guys,

 

i have a 2014 Vrs, once the engine is up to temp the fan kicks in and then stays on. I have tried changing the thermostats and it didn’t fix it. 

 

Having had it on VCDS, the radiator is reading 150’ coolant temp when it’s actually around 80-87’. 

 

Does anyone know if know if a new radiator switch could be the cause? 

 

Cheers 

 

[Breezy_Pete]

Does it actually have a radiator thermoswitch?

Looks to me like the fan control module is part of the fan assembly itself, and that has a single data input from the engine ECU, presumably telling it what the G62 engine coolant temperature sensor is reading? Perhaps that wire is bust?

Edited 5 September, 2018 by Wino

[Lee]

TSI engine - cooling system.pdf

[Breezy_Pete]

Ah, nice one Lee. There's a G83 - Radiator outlet coolant temperature sender too, in bottom rad hose (page 41 of that pdf), I missed that in the wiring diags. Connects to engine ECU.

If that's the one that's reading 150°C it'll be that or the wiring for it, I suppose.

Edited 5 September, 2018 by Wino