Hi, new guy here. For some time now the radiator fan on my 2015 diesel VRS has been coming on before the engine has even reached half way to normal temp and never goes off. Been to 2 different garages who are unable to fix this issue. (According to their diagnostic equipment there are no faults so nothing to fix). I am fairly certain that it is not due to the re-gen, and it is not the air con at fault. I was thinking that maybe the fan sensor is faulty but have no clue where to start looking for this assuming this is the problem. I am also using about 25% more fuel which I put down to the fact that the fan is on. I have had the car from 6k miles, now at 143k so safe to say I know something is not right. Thanks in advance for help.