I have two of the 110V toe heaters in my 93 Marathon. The one in the kitchen works fine, but the one in the bathroom will not turn on when I adjust the thermostat in the bedroom. I hear the thermostat click, but there is no voltage getting to the heater. I assume there is a relay somewhere that sends the 110V to the heater when I turn the thermostat. Does anyone know where the relay is located? If I am on the wrong track, I figure you will tell me that too. Thanks. Dale