OEM Lennox Defrost Control Board Kit — 13U60

The genuine OEM Lennox 13U60 defrost control board kit is the electronic brain that manages the defrost cycle on your Lennox heat pump. Using inputs from the defrost thermostat and timing logic, this board initiates and terminates defrost, energizes the reversing valve, and controls the outdoor fan and auxiliary heat so frost is cleared from the outdoor coil without disrupting indoor comfort. The kit includes the mounting hardware and connectors needed for a complete, straightforward replacement.

Common failure symptoms: A faulty defrost board often causes heavy ice or frost buildup on the outdoor coil, a heat pump stuck in defrost or that never defrosts, no outdoor fan operation, failure to switch between heating and cooling, or a unit that won't run at all. Erratic staging and blown board fuses are also telltale signs.

Why OEM matters: Defrost timing, sensor thresholds, and relay ratings are calibrated specifically to your Lennox heat pump model. A generic board can mistime defrost, misfire the reversing valve, or lack the correct terminals — leading to coil damage, reduced efficiency, and voided warranty. The OEM 13U60 kit guarantees exact firmware logic, proper fit, and factory-rated reliability.