OEM Lennox Ignition Control Board — 15M50

The Genuine OEM Lennox 15M50 ignition control board manages the critical startup sequence of your furnace, coordinating the igniter, gas valve, blower, and safety limits to deliver reliable, safe heating. As a direct factory replacement, this board is programmed with the exact timing and diagnostic logic your Lennox furnace requires for proper operation.

Common failure symptoms include a furnace that won't ignite, no response when the thermostat calls for heat, an igniter that never glows, blower motor issues, error or fault codes on the diagnostic LED, and intermittent no-heat conditions. A failed control board disrupts the ignition sequence and can lock out the furnace entirely, leaving your home without heat.

Why OEM matters: Ignition control boards govern gas-fired safety functions, so precise, verified programming is essential. The authentic Lennox 15M50 guarantees correct ignition timing, accurate flame sensing, and proper safety lockout behavior that aftermarket boards may not replicate. Choosing the genuine OEM board ensures safe operation, full compatibility with your Lennox system, and dependable heating performance you can trust.