York S1-026-36561-000 Rollout Switch 318423-701 it is best practice to

it is best practice to isolate the valve if significant torque is required to avoid potential stem blowout or hardware failure

this is an upgraded Source1 replacement for several legacy York part numbers

whereas the older MT used mineral oil for R22

replacing the assembly will facilitate immediate gas crossover and smoother ignition

York S1-026-36561-000 Rollout Switch 318423-701 it is best practice toThe York S1 026 36561 000 Rollout Switch is a critical safety component designed for precise thermal monitoring in high efficiency gas furnaces. This OEM flame rollout switch is engineered to open the electrical circuit when the combustion zone temperature reaches 350 degrees F, effectively preventing hazardous conditions caused by improper venting or heat exchanger failure. As a manual reset rollout switch, it requires a physical inspection of the