Hi All,
My Auxiliary fan never turns on. On hot days when running the air conditioner the engine temp rises above normal. My understanding is that the fan is supposed to go on when the air conditioner is on and also goes on when engine temp rises above normal. I tested the fan directly and it works. I replaced the fan relay located in the box on the fender, no change. I also replaced the fan switch at the top of the thermostat housing, no change. Lastly, I tested the pressure switch at the drier, when I bypass the switch I get a click sound from the relay, fan does not turn on. Any help from the MB gurus would be much appreciated.
Thanks,
Sal