OEM Lennox Ignition Control Board — 16C81
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The genuine OEM Lennox 16C81 ignition control board is the electronic brain that sequences your furnace's heating cycle. It manages the draft inducer, hot surface or spark ignition, gas valve timing, flame sensing, and blower operation while continuously monitoring safety limits and pressure switches. Precise timing and reliable flame verification depend entirely on this board.
Common failure symptoms: When the 16C81 fails, you may see no ignition, a furnace stuck on a diagnostic flash code, intermittent no-heat calls, or a system that ignites then drops out. Corroded traces, blown fuses, cracked solder joints, or a board that won't respond to a thermostat call all point to replacement.
Why OEM matters: Furnace control boards are programmed with model-specific ignition timings and safety logic. A universal or aftermarket board may mis-sequence components or bypass critical protections. The factory Lennox 16C81 guarantees the correct firmware, connector layout, and safety interlocks your furnace was certified with — restoring dependable, code-compliant heating.
Shipping Information
- Orders placed before 3PM CST ship same business day
- Standard delivery: 2-5 business days
- Express shipping available at checkout
- Free shipping on orders over $75
- Tracking number emailed upon shipment
Return Policy
- 30-day returns on unused parts in original packaging
- Electrical parts (capacitors, contactors, control boards) are final sale once installed
- Email info@nationalhvacparts.com to initiate a return
- Refunds processed within 5-7 business days