OEM Lennox Ignition Control Board — 56W19
OEM Guaranteed
Same-Day Ship
30-Day Returns
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The genuine OEM Lennox 56W19 ignition control board is the electronic brain that manages the startup and safe operation of your Lennox furnace. It sequences the ignition process — energizing the igniter, opening the gas valve, verifying flame with the sensor, and controlling the inducer and blower motors. It also runs continuous safety diagnostics, locking out the system if it detects an unsafe condition.
Common failure symptoms: A faulty 56W19 control board often causes no ignition, intermittent heating, the furnace failing to start on a call for heat, flashing diagnostic error codes on the board's LED, or a system that repeatedly locks out. Power surges, moisture, and corroded relays are frequent causes of board failure.
Why OEM matters: This control board is programmed with the exact ignition timing, safety sequences, and diagnostic logic your Lennox furnace requires. Generic replacements may lack proper flame-sense sensitivity or timing, leading to unreliable ignition and nuisance lockouts. The factory 56W19 guarantees correct pin configuration, plug-and-play fitment, and the safety compliance built into your Lennox system.
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