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 spade 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 12V DC applications only. Use a see-thru plastic cover when installing these boards in a water heater or refrigerator.