OEM Lennox Control Board — 81L76
OEM Guaranteed
Same-Day Ship
30-Day Returns
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The genuine OEM Lennox 81L76 control board is the electronic brain of your Lennox furnace, governing the ignition sequence, blower and inducer timing, and onboard safety monitoring. Manufactured to exact Lennox specifications, this board is a direct factory replacement that restores dependable, code-compliant operation to compatible Lennox systems.
A failing control board often shows itself through a furnace that won't ignite, short-cycling, the blower running nonstop or not at all, or blinking diagnostic LED fault codes. Burnt spots, corroded relays, or complete loss of power to the unit are clear indicators the board needs to be replaced.
OEM matters here more than almost anywhere in your system. The 81L76 is programmed with Lennox-specific timings, relay ratings, and connector pinouts that generic boards cannot reliably match. Installing the correct factory board avoids nuisance lockouts, protects downstream components like the igniter and gas valve, and keeps your Lennox furnace operating at its rated safety and efficiency.
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