the 100277952 is the manufacturer-designated direct replacement and is fully compatible with systems requiring the 100171899 part number

This unit is designed for use with Belimo LMB(X)

The integrated circuit breaker will trip to protect the 24 VAC secondary winding

this auto reset limit switch is ideal for board mount applications where space is at a premium but reliability is non-negotiable

or intermittent pressure switch fault codes

Williams P101600 Gasket 321702-401 the 100277952 is the manufacturer-designatedThe Williams P101600 Gasket is a critical OEM replacement part designed for integration within the combustion chamber and venting systems of Forsaire Counterflow Direct Vent Furnaces. For technicians servicing Williams wall furnaces, maintaining a gas tight seal is paramount to preventing CO leakage and ensuring the venting system operational integrity. This high temperature gasket is fabricated from industrial grade heat resistant material, capable