York S1-324-39721-012 Motor L99H008 is a heavy-duty millivolt gas

is a heavy-duty millivolt gas valve engineered for high-capacity heating systems such as commercial water heaters

including Hot Surface Ignition (HSI) and Direct Spark Ignition (DSI)

reducing the need to carry multiple single-voltage units on the truck

using this sensor in freezing conditions without heat tracing may damage the internal electrolyte and glass membrane

While both are within the 750 Series

York S1-324-39721-012 Motor L99H008 is a heavy-duty millivolt gasWhen you're out in the field dealing with a failed blower in a York, Guardian, or Coleman furnace, you need an exact OEM match to restore the specific airflow profiles programmed for that cabinet. The York S1 324 39721 012 Motor is a factory programmed 1 2 HP 115V ECM (Electronically Commutated Motor) designed for precision variable speed operation. Unlike generic overrides, this Source 1 replacement motor maintains the factory set CFM parameters