I need to do the line to the pressure switch for sure I had to thaw that two times last week.

Maybe just insulating my pump house, that line, and putting a heat lamp in there I`ll be ok.

I did see a on @ 35F and off @ 45F plug too.. but I`m not sure a heat lamp can raise the pump house 10* within a reasonable time. If so then the sensor + heat lamp may be all I need

At least all these options are affordable!