Lochinvar & A.O. Smith 100171987 Valve 318423-701 Set your multimeter to the

Set your multimeter to the DC microamp (µA) scale and wire it in series with the flame sensor lead

ensuring reliable flame proving and consistent performance across both heating stages

including APD

always mount the switch with the diaphragm in a vertical plane

the 94C90 is identical to part number 94C9001 and is commonly found in Lennox G11 and G12 series units

Lochinvar & A.O. Smith 100171987 Valve 318423-701 Set your multimeter to theUpgrade your system with the Lochinvar & A. O. Smith 100171987 Gas Valve Assembly, a critical component for maintaining precise manifold pressure in high efficiency water heaters and boilers. This OEM gas valve replacement is designed to regulate natural gas and propane flow with a redundant valve seat configuration, ensuring reliable ignition and stable combustion cycles. Integrating this genuine part into your HVAC gas valve assembly prevents common