just an update ive found by jumping the wires at the fan switch on the o/s top of radiator the fan will work ive also found occasionally it will run when the engines warm and the aircon is on but mostly it doesn't run at all is this normal? every other car ive owned (non of them have been a bmw) when the air con compressors been on the fan has also ran so I don't know if this is a fault or if the air con in the bmw doesn't run the fan very often sorry for all the questions but im new to bmw,s and not sure whats normal thanks very much for any help you can give me rich