While it may share dimensions with some Armstrong or AirEase equipment (which fall under the Lennox International umbrella)

The die-cast aluminum enclosure features a NEMA 4 (IP65) rating

providing a seamless drop-in fit for high-pressure refrigeration circuits

Key Benefits for the Contractor Precise Thermal Control: Features a fixed 150°F trip point with a 30°F reset differential to ensure optimal equipment safety without premature tripping

increasing fail-safe reliability

Lennox 55W64 Pressure Switch While it may share dimensionsThe Lennox 55W64 High Pressure Switch is an essential safety and operational component designed for high pressure monitoring in residential and commercial HVAC systems. This genuine OEM replacement part ensures your equipment operates within safe parameters, specifically engineered to actuate at 590 PSI and features an automatic reset at 418 PSI. As the direct replacement for discontinued models 30W18 and 30W1801, this switch maintains the integrity