Rugged Construction: Bronze body and stainless steel springs provide reliability in 200 PSI wet-heat applications

the sensor resistance may be drifting out of spec

scorched internal seals from over-heating during brazing

This non-spring return electric actuator is engineered for precise modulation of dampers and valves

Lennox 18M63 Pressure Switch 320735-701 Rugged Construction: Bronze body andThe Lennox 18M63 Pressure Switch is a high precision, two stage OEM furnace part specifically engineered for compatible Lennox, Armstrong, and Ducane heating systems. This dual action component provides critical monitoring of combustion air pressure, ensuring the inducer fan maintains the proper venting required for safe ignition and continuous high efficiency operation. With fixed set points of 0. 20" WC and 0. 45" WC, this switch accurately