Thanks for all the answers.
My problem is that I need my car every day and I have no alternate solution. Sometimes I start at 3;30 Am in the airport 10 miles from my home...
It it possible for me to remove the pcb and use my car without the fan (just to go at work?)
Is the radiator switch could be faulty too ?
Sending and receiving the PCB will take a long time. My last order to Rimmer took 10 days to be delivered..
What if I buy this:
https://www.ebay.co.uk/itm/272733752...MakeTrack=true