OEM Lennox Ignition Control Board Kit — 12X09
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Same-Day Ship
30-Day Returns
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The genuine OEM Lennox 12X09 ignition control board replacement kit governs the startup and safety sequence of your Lennox gas furnace. It manages the igniter warm-up, gas valve timing, flame sensing, and blower activation, ensuring each heating cycle lights cleanly and shuts down safely if a fault is detected.
Common failure symptoms: A failing 12X09 commonly shows up as a furnace that won't ignite, short cycling, the igniter glowing but no gas firing, repeated lockouts, flashing diagnostic LED fault codes, or the blower failing to start after ignition. Power surges, moisture, and worn relays frequently damage ignition boards.
Why OEM matters: Ignition control is a safety-critical function, and the factory 12X09 is calibrated to your Lennox furnace's exact flame-sense thresholds, timing, and gas valve compatibility. Genuine OEM parts protect against unsafe ignition sequences and nuisance lockouts that generic boards can introduce. Choosing the correct Lennox board preserves both safety certifications and rated performance. Verify the part number on your furnace's control assembly matches before installing.
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