Terry, the way I understood the manual, the heater won't come on until it hits 77.0 and the fan won't come on until it hits 78.0. They both adjust to 77.5 and then shut off again. I may be wrong though...
I mounted it on the side mostly out of sight. I didn't want it completely out of sight so I could keep an eye on everything when I walk by. I may drill a hole for the wires so they don't have to trail around the side.
The temp probe wire (and pH when I install it) is routed where it doesn't go too close to any power cords.
