E63 Cooling Fan Problem

[Chr1s]

Howdy all, my 2013 E63 has developed a fan problem this morning. Switched the car on and almost immediately the radiator cooling fan switch on and will not turn off.

No warning lights or heating issues and car drives fine etc.

Any thoughts? I am assuming a faulty sensor or switch of some sort?

 

[whitenemesis]

The cooling fan also cools the a/c condenser.

Best to get the codes read to see what's going on

 

[sbk1972]

I wonder if your fan on a 63 is the same as mine on ML55. The fan module is directly fed from the battery and runs on different volt feeds from the CAN. Mine is a metal box / module that sits on the fan housing.

If so, then on my set up, if the fan is on all the time its a safe feature if the fan module is fried i.e. better to be broken and on, than off.

Differently a case of reading codes / merc dealer

Best of luck.

Simon