Optimized Drainage: Smooth internal radius reduces surface tension to prevent condensate backup

helping technicians prevent acid formation and compressor motor burnout

reducing the need for additional capillary tubes or complex bracketry

Is this limit switch compatible with older Ruud furnace models

consolidating several fixed-voltage inventory items into one part

Lennox 63W57 Pressure Switch Els PW 17895 Optimized Drainage: Smooth internal radiusThe Lennox 63W57 Pressure Switch is a critical genuine OEM component engineered for precise furnace diagnostic monitoring. This SPST furnace pressure switch is factory calibrated with a 0. 55 . 95" WC pressure rating, ensuring the inducer motor provides sufficient draft for safe combustion. As a direct replacement for Lennox 56M22, the 63W57 eliminates compatibility guesswork during emergency service calls. It functions as a safety interlock,