OEM Lennox Contactor DPST 24V 30A — 28N99

The genuine OEM Lennox 28N99 (equivalent DP2030A5013/U) is a DPST double-pole, single-throw contactor with a 24-volt coil rated for 30 amps. It switches line voltage to the compressor and condenser fan motor in your Lennox outdoor unit, closing both poles simultaneously when the thermostat's 24V signal energizes the coil. As a 2-pole design, it is commonly used in single-phase Lennox air conditioners and heat pumps where two legs of power need to be broken cleanly on every cycle.

Common failure symptoms: pitted or fused contacts that leave the condenser running after the cooling call ends, a buzzing or humming coil that won't pull in, a compressor that fails to start, and charred or arced terminals. A worn contactor is among the most common reasons a Lennox unit stops cooling.

Why OEM matters: the Lennox 28N99 is manufactured to the exact coil voltage, contact rating, and footprint your system requires. Installing genuine OEM ensures proper switching performance, correct terminal fit, and dependable service life — protecting your compressor and preserving Lennox warranty coverage.