the 110851 is calibrated with a natural gas pilot orifice

bolt-on replacement process

and X13540639010 for simplified inventory

For those working with diverse fuel sources

They handle thermal cycling better and are less prone to damage from accidental contact during maintenance

York S1-431-01972-100 Furnace Control Kit Els PW 17895 the 110851 is calibrated withThe York S1 431 01972 100 Furnace Control Kit is a professional grade integrated ignition control designed to serve as the central logic unit for a wide range of York, Coleman, and Luxaire gas fired furnaces. This kit is a critical HVAC replacement part that manages complex burner sequences, including the inducer motor draft, igniter warm up, and gas valve regulation. By monitoring flame sensors and limit switches, it ensures safe and efficient