Hi Folks,
I have a 2003 MCS and having some trouble sourcing problem with my radiator fan not coming on. Both low speed and high speed not engaging. Car overheated twice and initially thought it was thermostat so replaced. No overheating since but noticed fan not coming on. Changed resistor on fan and still no joy. Checked all fuses and relays and wired fan direct and fan is working. Baffled!!! Tried AC on and still no low speed fan. Thought it might be engine coolant temp sensor on cylinder head but no loss of power in car and gauge in cabin is sitting on halfway as normal. Left car running for 30 mins no overheating but no fans. Can anyone shed some light on this please. Cheers

 

I have this same issue my cars fan wouldn’t shut off and it’d kill the battery and now the fan doesn’t turn on but the car doesnt overheat

 

Hey man I have the exact same issue, we’re you able to find out what the problem was please help me.
thank you!