OEM Lennox Low Pressure Switch — 10W64

The genuine OEM Lennox 10W64 low pressure switch is a critical safety control that monitors refrigerant pressure on the suction side of your Lennox air conditioning or heat pump system. When system pressure drops below a safe threshold — typically caused by a refrigerant leak or loss of charge — this switch opens the circuit and shuts down the compressor to prevent catastrophic damage. It is engineered to the exact pressure settings and electrical specifications required for reliable Lennox operation.

Common failure symptoms include a compressor that won't start, short cycling, nuisance system lockouts, or the outdoor unit tripping off during normal operation. A switch that fails open will prevent cooling entirely, while a stuck-closed switch removes an essential layer of compressor protection.

Choosing an OEM Lennox 10W64 matters because generic aftermarket switches often carry incorrect cut-in/cut-out pressure settings that can allow compressor damage or cause repeated false trips. This factory part guarantees proper calibration, correct terminal connections, and dependable performance that keeps your Lennox equipment protected and your warranty intact.