1Versatile Compatibility: Fits most brands of furnaces, refrigerators, and water heaters. such as for Norcold, for Servel, for Coleman, for DuoTherm, for HydroFlame, for Suburban Furnaces and for Atwood. 2Reliable Ignition: Electronics ignition circuit board features 3 try ignition with delay and surge protection for smooth and consistent ignition performance. 3Convenient Diagnostics: Handy LED light glows green when power is applied to the board and turns red when the board activates the gas valve, making troubleshooting easy. 4High Security: Replaceable fuse protects the board from short circuits on the Nc and valve terminals, ensuring safe and reliable operation. 5Easy Installation: Small size and spade spark lead connector make installation simple and hassle free, fuse and surge protected, safe to use.