Rad fan running constantly, 75 club se ctdi

[Raymie75]

[QUOTE

If the coolant temperature sensor (CTS) is defective or the wiring to it, then the ECM sees the temperature as -130 degrees Celcius, and the coolant fan operates continuously.

Thanks Brian. I wll check this.

Raymie

[Raymie75]

Originally Posted by marinabrian

You need to activate the on board diagnostics to see what the ECM is seeing the engine temperature as.

If the coolant temperature sensor (CTS) is defective or the wiring to it, then the ECM sees the temperature as -130 degrees Celcius, and the coolant fan operates continuously.

The OBdiagnostic how too HERE

It's a quick enough test to carry out

Brian

I will try that Brian.. Thanks

[Raymie75]

I will try what Brian suggests, very helpful. Thanks

[SD1too]

Originally Posted by Raymie75

The fan stops spinning as soon as ignition is turned off.

Thanks Raymie. In which case it probably isn't the printed circuit board. Let us know how you get on with the digital temperature reading.

Simon