York S1-9951-0861 Gas Orifice and Luxaire manifold assemblies

and Luxaire manifold assemblies

Test with a multimeter against the manufacturer's resistance-temperature chart

facilitating accurate evaporator coil temperature sensing to prevent freeze-ups and optimize refrigerant flow

a #42 drill size orifice typically flows 25

blocked return vents

York S1-9951-0861 Gas Orifice and Luxaire manifold assembliesThe York S1 9951 0861 #44 Gas Orifice is a high precision LP gas conversion component engineered specifically for York heating systems. This OEM replacement orifice features a #44 drill size with a 0. 0860 inch diameter, precisely calibrated to regulate liquid propane flow at 11. 0 inches Water Column (W. C.). Designed for robust performance in multi stage gas furnaces and boilers, this part ensures stoichiometric combustion to prevent soot buildup