Use in Dometic and Norcold refrigerators. Use in Coleman Duo-Therm Hydro-Flame and Suburban furnaces. Use in Atwood Mor-Flo or Suburban water heaters. Works in any furnace refrigerator or water heater that uses a standard ignitor board. Includes post connectors for the spark lead. A fuse on the board protects the board against short circuit damage. A handy diagnostic light on the board is green to show power to the board and red to indicate power to the gas valve. For 12 VDC applications only. Use a see-thru plastic cover when installing these boards in a water heater or refrigerator.