OEM Lennox Ignition Control Board Kit — 87W78

The genuine OEM Lennox 87W78 ignition control board kit (factory part 607308-07) manages the ignition sequence in your Lennox furnace, coordinating the igniter, gas valve, and flame sensor to deliver safe, reliable heat. This control monitors flame proving and safely locks out the system if ignition faults are detected, protecting your equipment and your home. It is engineered as a direct replacement for compatible Lennox furnace platforms.

Common failure symptoms include a furnace that fails to ignite, short cycling, no response to a call for heat, an igniter that never glows, or repeated safety lockouts. A cracked board, burnt relays, or corroded traces on the original control are frequent culprits when heating becomes intermittent or stops entirely.

Choosing the OEM Lennox 87W78 matters because Lennox ignition timing, flame-sense thresholds, and safety logic are calibrated specifically for their furnace design. Aftermarket boards can introduce nuisance faults, mis-timed ignition, or safety issues. Installing the factory-matched control ensures correct sequencing, full compatibility with your unit's wiring harness, and restored dependable performance.