OEM Lennox Furnace Integrated Control Board — 87W24

The genuine OEM Lennox 87W24 integrated control board is the electronic brain of your Lennox furnace, orchestrating the entire heating sequence. It manages ignition timing, monitors the flame sensor and safety limits, sequences the inducer and blower motors, and communicates with the thermostat to deliver reliable, efficient heat. Every safety interlock and timing function runs through this board, making it essential to safe furnace operation.

When a control board fails, symptoms can range from a completely dead furnace to intermittent no-heat calls, blowers that won't shut off, failure to ignite, or diagnostic fault codes flashing on the board's LED. Voltage surges, overheating, and corroded relays are common causes of board failure, and a failing board often mimics other component problems, so accurate diagnosis is key.

OEM matters because the 87W24 is programmed with Lennox-specific ignition timing, safety logic, and motor sequencing validated for your exact furnace model. Generic or reflashed boards may use incorrect timing that reduces efficiency, causes nuisance faults, or defeats built-in safety features and your warranty. Restore proper operation with the factory-engineered Lennox control board designed to match your system exactly.