Dometic Atwood 31092 OEM RV Hydroflame Furnace On/Off SwitchThis is a replacement ON/OFF switch located on the furnace, serving as the initial gateway for electrical power, allowing current to flow to the circuit breaker and the thermostat. This switch is also a safety power shut off to the furnace ignition and gas valve systems if necessary.Compatible with7912-II, 7916-II, 7920-II, 8012-II, 8516-III, 8516-IV, 8520-III, 8520-IV, 8525-III, 8525-IV, 8531-III, 8531-IV, 8535-III, 8535-IV, 8935-III-AC, 8935-III-DC, 8940-III-AC, 8940-III-DC, AFLA35211, AFLA40211, AFLA35221, AFLA40221, AFLA35231, AFLA40231, DFLA35211, DFLA35221, DFLA35231, DFLA40211, DFLA40221, DFLA40231