Rad fan kicking in on cold start up?

[Danny-ACE!]

WWWHHHYYYYY???

Anyone know why this could be happening?
When i turn the car off it slows down and then turns off after about 30 seconds.

Thanks!

 

[Dunn]

Not the aircon pump you can hear?

 

[Danny-ACE!]

I dont have air con, its definatley the rad fan.

Forgot to mention i have a MK1 F4R conversion.

 

[Jonny1*2]

Relay knackered?

 

[MicKPM]

Check the coolant temp sensor is plugged in and is working correctly. When this is in open-circuit the ECM turns on the fan incase the vehicle is in an overheat situation.

Mick

 

[Danny-ACE!]

Just tried a new CTS and that didn't work. There is no reading of temperature on the clocks. Tried a new relay also, no luck. Is there anything else it could be or shall I start checking out my loom?

Ta!

 

[MicKPM]

Ideally I need to see it i'm afraid mate... could be an ECM AC request fault (if you're running a "modified" aka de-coded F4R Sirus ECM), a bad or back feeding earth on a circuit or a simple short to earth somewhere.

Mick