York S1-025-26392-003 Rollout Switch a critical protective component for

a critical protective component for your spark ignitor ignition assembly

The 391937 and 391937/U are the same Honeywell/Resideo conversion kit

it is backward compatible with 370V applications

What tool is required for securing the nuts

York S1-025-26392-003 Rollout Switch a critical protective component forThe York S1 025 26392 003 Rollout Switch is a critical thermal safety component designed for precise combustion monitoring in York, Coleman, and Luxaire gas fired furnaces. This SPST (Single Pole Single Throw) fixed temperature limit is engineered to interrupt the burner circuit if it detects a flame rollout condition, preventing potential equipment damage or hazardous operation. Built by Therm O Disc, this flame rollout switch features a 145 degree F