Lennox 51W91 Pressure Switch The solid-state design ensures reliability

The solid-state design ensures reliability by eliminating mechanical wear

The sensor is constructed with a stainless steel bulb and a 9 3/4-inch PVC cable

making it a staple for any technician's service truck

these parts are technically identical in specifications

Lennox 51W91 Pressure Switch The solid-state design ensures reliabilityThe Lennox 51W91 Pressure Switch is a critical safety component engineered for precision in Lennox gas furnace repair and maintenance. As an authentic OEM HVAC replacement part, this SPST pressure switch is calibrated to a specific set point of 0. 95" WC (water column), ensuring the inducer motor is drafting correctly before allowing the ignition sequence to proceed. Professionals recognize the Lennox 51W91 as the 56M05 direct replacement, maintaining