a double retaining seal

the switch itself must be purchased separately or salvaged from the existing assembly

Key Benefits System Stability: Maintains optimal superheat levels to maximize heat transfer across the evaporator coil

or simple fatigue from thousands of ignition cycles

Use a multimeter to check for continuity across the switch terminals while the blower is at full speed

Lochinvar & A.O. Smith 100165925 Ignitor R-410A a double retaining sealThe Lochinvar & A. O. Smith 100165925 Ignitor is a critical OEM replacement part designed for high efficiency condensing boilers and commercial water heaters. This hot surface ignitor kit is engineered for precision performance in the Lochinvar Knight series (WHB 55 through 399) and A. O. Smith high input systems. The assembly utilizes high grade ceramic insulation and a robust heating element to ensure consistent spark ignition across varying gas