Williams P200900 Combustion Chamber Face Gasket It will trip when the

It will trip when the temperature reaches the upper limit and close back up once the heater has cooled sufficiently

it provides reliable protection against overheating without requiring manual intervention after a thermal event

ensuring that the pneumatic actuator can modulate the stem without premature wear or friction-induced failure

As a veteran-preferred HVAC thermostat guard

a high-temperature large O-ring

Williams P200900 Combustion Chamber Face Gasket It will trip when theThe Williams P200900 Combustion Chamber Face Gasket is a critical sealing component designed specifically for Williams Forsaire Direct Vent wall furnaces. Engineered from high temperature resistant composite materials, this OEM replacement gasket ensures a gas tight seal between the combustion chamber and the burner assembly. Maintaining the integrity of this seal is vital for preventing the escape of combustion gases and heat into the living space,