What it does: Overtemperature thermal safety cutoff that automatically cuts power at 98°C (208°F) to stop overheating and reduce fire risk in RV water heaters. Why you need it: Prevents dangerous overheating, protects the water heater and surrounding components, and avoids costly repairs or unsafe failures while traveling. Direct replacement: Designed as a direct replacement for Atwood part numbers 91447 and 93866. Compatible with the following Atwood EXT series models: G6A3E/4E/6E/7E/8E, GH63E/4E/6E/7E/8E, GCH64E/6E/7E, GCH6A7E/8E/9E/10E, GC6AA7E/8E/9E/10E, G101E/2E/3E, GC101E/2E, GC10A2E/3E/4E, GH101E/2E/3E, GCH10A2E/3E/4E, G6103E, GC6A7E, GH6103E, WH9EXT, G9EXT, GE9EXT, GEH9EXT, G16EXT, GE16EXT, GEH16EXT. Dualenergy compatibility: Works with both gas and electric configurations used in Atwood RV water heaters, so it can be used in systems that switch between or combine energy sources. Durable electrical connections: Uses corrosionresistant tinned copper wiring to withstand humid and marinelike RV environments and maintain reliable electrical contact over time. Performance and reliability: Engineered to activate at 98°C (208°F) for consistent overtemperature protection. worn or aging safety devices proactively to maintain dependable operation. Installation notes: Direct replacement for the specified Atwood part numbers and EXT series models. Confirm your unit's part number and model compatibility before installation. Typical use scenarios: Pretrip safety check: an aging cutoff before a long road trip or extended boondocking to prevent an unexpected heater shutdown or dangerous overheating while offgrid. after failure: Swap in this direct replacement when an Atwood water heater has tripped repeatedly, shows signs of overheating, or when the original safety cutoff has failed. Routine maintenance or restoration: Install during water heater servicing or when refurbishing an RV EXT series unit to restore original safety performance and corrosionresistant wiring. Key attributes at a glance: Function: Overtemperature thermal cutoff (automatic power cut at 98°C / 208°F) Compatibility: Direct replacement for Atwood 91447 / 93866 and the listed EXT series models Energy type: Gas and electric compatible Wiring: Corrosionresistant tinned copper Benefit: Enhances safety, prevents overheating, reduces risk of fire and costly breakdowns worn safety devices proactively to keep your Atwood RV water heater operating safely and reliably.