Verify the part number against your unit's manual or check if you are replacing the older 100167583 model

It maintains the same physical footprint and electrical tolerances required for older valve assemblies

ensuring consistent performance even in turbulent airflow conditions

the Cleveland Controls AFS-275 should be mounted with the diaphragm in a vertical plane

Lochinvar & A.O. Smith 100278104 Switch 318518-761 Verify the part number againstThe Lochinvar & A. O. Smith 100278104 Switch is a critical safety component designed for high performance hydronic and domestic hot water systems. This 100F manual reset limit switch acts as a primary thermal safeguard, effectively monitoring surface or water temperatures and interrupting the electrical circuit to the gas valve if the 100 degree Fahrenheit threshold is exceeded. Engineering for reliability, this manual reset high limit switch prevents