OEM Lennox Contactor — 46K50

The genuine OEM Lennox 46K50 contactor is the electrically operated switch that energizes the compressor and condenser fan motor in your Lennox outdoor unit. When the thermostat calls for cooling, its 24-volt control coil closes the contacts and passes line voltage to the system, starting the cooling cycle. Since it engages on every run cycle, the contactor endures constant electrical and mechanical stress and is a leading cause of no-cool service calls.

Signs that the 46K50 needs replacing include an outdoor unit that won't start, a compressor that hums but doesn't kick on, chattering or buzzing at the control panel, and contacts that stick or weld shut, keeping the compressor running non-stop. Pitting, corrosion, and insect intrusion on the contacts are typical failure modes.

Choosing the OEM Lennox 46K50 ensures the proper contact rating, coil voltage, and terminal arrangement engineered for your Lennox equipment. Generic contactors may not match Lennox's coil pull-in and contact-life specifications, risking early failure or unreliable switching. This factory-original part provides a direct, trustworthy replacement.