Laars Heating Systems W0040900 Pilot Assembly 318172-701 making it suitable for heat

making it suitable for heat pump outdoor or indoor coils without the need for additional check valves in some configurations

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

also identified by part number 18G8901

As a core component in Lennox

Laars Heating Systems W0040900 Pilot Assembly 318172-701 making it suitable for heatThe Laars Heating Systems W0040900 Natural Gas Pilot Assembly is a critical OEM component designed for high performance ignition cycles in residential and commercial hydronic systems. As a veteran grade Natural Gas Pilot Assembly, this unit ensures precise flame rectification and reliable pilot burner performance across the Laars Mini Therm JVT series (sizes 50 225) and legacy Teledyne Laars boiler models. Built for the rigors of high duty cycles,