I just bought a house with a daylight basement with 3 heaters in one room one of them being about 6-8 feet long and it will not shut off for some reason. This heater heats up the whole house even with the thermostat down to 50 and the other 2 are off completely. Any suggestions as to why this would happen? My guess is that it has to do with the thermostat but that does not explain why the other 2 heaters attatched to the same thermostat are working properly.