Lochinvar & A.O. Smith 100208621 Harness Durable Construction: Heavy-duty housing designed

Durable Construction: Heavy-duty housing designed to withstand the thermal demands of heating and cooling equipment

The switch should read as "closed

What causes a furnace transformer to burn out

including gas and electric furnaces and heat pump systems

Operating as a normally closed SPST switch

Lochinvar & A.O. Smith 100208621 Harness Durable Construction: Heavy-duty housing designedThe 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