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The genuine OEM Lennox 95M56 contactor is the electromechanical switch that delivers line voltage to your condensing unit's compressor and fan motor on a cooling call. Its 24V coil is controlled by your thermostat and control board, closing the high-current contacts that start your outdoor equipment. As a component that engages every cooling cycle, it is a frequent replacement item in Lennox systems.
Common failure symptoms: A worn 95M56 may cause the outdoor unit to buzz without starting, produce chattering or clicking sounds, or leave the compressor stuck running after the thermostat is satisfied. Burned, pitted, or welded contacts and a coil that no longer pulls in are classic indicators that replacement is due.
Why OEM matters: The 95M56 is spec'd to your Lennox unit's exact pole count, contact amperage, and coil voltage. Installing the factory part guarantees correct fit at the mounting bracket and terminals while providing the heat- and arc-resistant contacts Lennox engineered for long service life. Generic contactors can undersize the contacts and lead to premature failure or unreliable compressor starts.