it provides the precise calibration necessary to switch fuel sources without compromising burner stability or combustion safety

When using the Rheem-Ruud 68-21016-01

It is widely used with Belimo AF

Direct OEM Compatibility: Verified fit for York S1-02531813000

To prevent slippage

Lochinvar & A.O. Smith 100208621 Harness it provides the precise calibrationThe Lochinvar & A. O. Smith 100208621 Spark Electrode Harness is a critical OEM replacement component designed for high efficiency boiler ignition systems. Also identified by the industry cross reference WRE2210K, this ignition harness provides a high voltage path from the DSI control module to the spark electrode, facilitating reliable combustion across various condensing boiler and water heater models, including the Lochinvar KB150, 151, and 210 211