Via water temperature.... but also thinking to have an override switch also.Yes you can leave it off.
How’s the electric 1 operating?
Any recommendations?+ 2 for fitting a good aftermarket gauge that reads in numbers degrees.
+1 for fitting a decent gauge. Personally I can't get my 200TDi to run above 85 degrees and I haven't had a fan since fitting the engine 4 years ago. I'm not towing anything heavy or working it hard off road of course. These engines are known for running cool, if it's getting too hot it might be worth flushing the rad out.