OEM Lennox Integrated Ignition Control Board — 56M61

The Lennox 56M61 is a genuine OEM integrated ignition control board that serves as the brain of your Lennox gas furnace. It coordinates the ignition sequence, monitors flame sensing and safety switches, and sequences the inducer, igniter, gas valve, and blower to deliver safe, reliable heat. This board is engineered to Lennox factory specifications for exact fit and compatibility with the furnace models it was designed for.

Common failure symptoms include a furnace that won't ignite, short cycling, no response to a thermostat call for heat, blower motor running continuously, or diagnostic LED fault codes flashing on the board. Visible signs such as scorched relays, burned traces, or corrosion on the control also indicate the board has failed and needs replacement.

Why OEM matters: Lennox furnaces rely on precise timing and safety logic that only a factory-matched control board can provide. Generic or aftermarket boards can misread safety inputs, mis-sequence components, or void your equipment warranty. Installing the genuine Lennox 56M61 restores proper operation, protects the rest of your furnace, and keeps your system running the way the manufacturer intended.