Misalignment can cause flame rollout or improper heating of the flame sensor

This kit is the primary service solution for FA4A

Reliable Signaling: The 1 N/O (Normally Open) contact configuration provides a clean circuit closure for system feedback and secondary load control

Featuring a 10 5/8" diameter and a 10 11/16" width

this model is the official replacement for the TE-6321P-1 and fits the same mounting footprint and wiring specifications

Lochinvar & A.O. Smith 100208514 Relay Els PW 17895 Misalignment can cause flame rolloutThe Lochinvar & A. O. Smith 100208514 Relay is a critical 24V electromagnetic control designed for precise low voltage circuit switching in commercial and residential hydronic systems. As the direct replacement for RLY2903, this OEM component ensures seamless HVACR system compatibility when interfacing between thermostat controllers and high load mechanical parts. This 24VAC relay is frequently utilized in boiler control boards and water heater wiring