Lennox 18M63 Pressure Switch 320734-701 the 450 psig high-side rating

the 450 psig high-side rating makes it suitable for high-pressure refrigerants like R-410A

offering identical fitment and performance

Robust Liquid Handling: Large internal volume protects the reciprocating compressor against liquid refrigerant slugs during startup or defrost cycles

With a 10A contact rating and 50/60Hz frequency compatibility

Lennox 18M63 Pressure Switch 320734-701 the 450 psig high-side ratingThe 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