Hey Starfire,
Interestingly, I have just been playing around with the temp switches on my beast....I have a T piece at cyl head exit and have the one temp switch screwed in there... There are another 2 as well.... one on the top of the radiator, and one at the bottom...
I normally run with the "small fan" hooked up to the head switch...as soon as the water ex head hits about 80 or so, it starts a small fan on the radiator, just to help the hydronic cycle a bit...
If the top radiator switch hits 80+ C, the main big fan kicks in... I seldom use the bottom switch(normally parallel to the top one in case of failure), unless its really cold out and I want the engine to warm up a bit more than usual....
Today I hot wired the small fan on permanently, and put the main fan on the head temp switch....just for interest sake, to see how it pulls this evenings load....
Cheers
Ed