Thanks, but I am wondering if the newer circulation pumps are smaller and designed to run 24 /7. My 1 hp 2 speed pump runs always on low, maybe there is something with the way the heater is hooked up and not telling the pump to shut off when the temp is reached. The cord from the heater has 3 wires, that I am guesing are hot, nuetral and ground. Does anyone know if there should be be any addtional wires coming from the built in theomstat in the heater to the contol box? The box simpy consit of an airswitch, 2 identical relays.
thanks,
Eric