Seems like you need a thermostate on the heater with power to the thermostat at all times. What if you are on vacation in the winter and no one uses the well for days?
I use these yellow thermostat plugs from Lowes that turn on the heater at a few degrees above freezing and back off a few degrees above that. They are only a few dollars and save a lot of power. I do test them every year before winter hits. They just plug in between the heater and the wall recepticle.
I'm trying to get heat in the well house. The pressure tank and is located here, the well pump is submersible 40 ft down. Current I have an extension cord running to the heater but trying to elimanate that. Since there is power already in the well house from the pressure switch trying to figure out if tieing into that was possible?
Is it 115 with ground?
I would just put a small junction box upstream of the switch and put a receptacle fun the heater through the timer.with a timer and heater there.
The reason I'm saying a timer is bc thermostats on those small heaters are not very effective.
Only other problem would be the heater and pump running at the same time...tripping breaker. That could be remided but it would be expensine.
Is the well house above ground? Can U put it underground in a tanks/vault and insulate it? Can U put the pressure tank inside your home where the heat is? Just giving U some more options than trying to cope with the situation U have. There are better ways of doing things. Check with local professional well drillers in your area, they might be a great source of info for your problem.
The well house is above ground. Waiting for a call back from the well guys. Its 240v. This it basicly what I was asking something like this but I dont know if light bulbs are enought heat and the wiring safe at 15 below which we can get here.