OEM Lennox Dual Contactor Kit — 43W56

The genuine OEM Lennox 43W56 dual contactor kit is the electrical switching device that controls power to the compressor and condenser fan motor in your Lennox outdoor unit. When the thermostat calls for cooling, the 24V control coil pulls the contacts closed, sending line voltage to the components. Built to Lennox specifications, this dual-pole contactor handles the amperage and switching duty your system demands, and the kit includes what you need for a clean replacement.

A worn contactor is one of the most common causes of no-cool service calls. Symptoms include a compressor and fan that won't start, a buzzing or chattering sound from the contactor, visibly pitted or burned contacts, welded contacts that keep the unit running non-stop, or intermittent operation. Insects and debris lodged in the contactor can also prevent it from closing properly.

Choosing the OEM 43W56 ensures the correct coil voltage, contact rating, and physical footprint for your Lennox equipment. An undersized or mismatched aftermarket contactor can arc, overheat, and fail early, risking damage to the compressor and fan motor. Install the genuine Lennox kit for reliable switching, full compatibility, and long service life.