Lennox 34M77 Pressure Switch Els PW 17895 This specific model is a

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Lennox 34M77 Pressure Switch Els PW 17895 This specific model is aEnsure reliable sequence of operation with the Lennox 34M77 Pressure Switch, a critical safety component designed for heating and cooling systems. This OEM Lennox furnace pressure switch is engineered to monitor draft pressure and confirm proper inducer motor performance before allowing the ignition process to begin. Featuring a precise 1. 00"wc SPST (Single Pole Single Throw) configuration, this switch actuates at 1. 00" W. C. and resets at 1. 15" W.