The Dometic Thermal Cut-Off Switch is designed to fit Dometic/Attwood DSI Series Water Heaters. This heat fuse helps protect your electronic-ignition water heater from damage caused by excessive heat conditions (e.g. flame blow-back from the burner). The upgraded Dometic 94398 Switch has a higher threshold and set-point on the sensors so it doesn't trip as quickly has the old kit. Compatible with ALL electronic (DSI) models: G6A-2E; G6A-3E; G6A-6E; G6A-7E; G6A-8E G9-EXT; G10-1E; G10-2E; G10-3E; G16-EXT; GC6A-7E; GC6A-8E; GC6AA-10E; GC6AA-7E; GC6AA-8E; GC6AA-9E; GC10A-2E; GC10A-3E; GC10A-4E; GCH6A-10E; GCH6A-7E; GCH6A-8E; GCH6A-9E; GCH10A-2E; GCH10A-3E; GCH10A-4E; GE9-EXT; GE16-EXT; GH6-6E; GH6-7E; GH6-8E. NOTE: This switch in not resettable or repairable. It must be replaced. Upgraded Dometic 94398 Switch has a higher threshold & set-point Switch is not resettable & must be replaced if tripped | Dometic Thermal Cut-Off Switch for /Attwood DSI Series Water Heater