[Doug Musick]

Got the relay and same problem, the heater runs constantly. Changed out the thermostat, same thing.

I disconnected the thermostat and connected the two wires, heater ran constantly, disconnected the two wires, the heater continued to run constantly. I removed the new relay for now and am just leaving the water closet door open to keep it comfortable.

Does the thermostat circuit operate by open = heater on and closed = heater off? If so I could have a broken wire in the loop somewhere causing the heater to run constantly. I think my next step is to test the continuity of the wires.