The Armstrong Furnace ALPKT574-3 Conversion Kit is a critical component for field-converting high-efficiency gas furnaces from natural gas to liquid propane (LP) operation

As a high-performance HVAC draft inducer switch

The Williams P213400 Fan Selector Switch F160-30F is a critical OEM-spec replacement component engineered for high-performance direct-vent and gravity wall furnaces

Featuring a 1/2 inch bore and a Clockwise (CW) rotation

preventing burner ignition and ensuring safe equipment operation

Lochinvar & A.O. Smith 100208375 Pressure Switch 30067439-890 The Armstrong Furnace ALPKT574-3 ConversionFor veteran contractors looking for a reliable replacement on Lochinvar and A. O. Smith units, the Lochinvar & A. O. Smith 100208375 Pressure Switch is the direct OEM solution for maintaining precise combustion safety. This dual pressure switch is engineered to monitor critical draft inducer performance, featuring factory set trip points of Hi 1. 06" WC and Lo 0. 75" WC. As a critical safety component, it ensures the venting system is clear and the