OEM Lennox Gas Valve Control Module Board — 56K85
OEM Guaranteed
Same-Day Ship
30-Day Returns
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The Lennox 56K85 is a genuine OEM gas valve control module board that governs the safe delivery and modulation of gas to the burners in your Lennox heating equipment. It coordinates ignition sequencing, valve actuation, and safety verification, ensuring the burner lights reliably and shuts off cleanly on every heating cycle in accordance with Lennox's safety logic.
Common failure symptoms: When the 56K85 fails, you may experience no heat, a furnace that ignites and then shuts down (short cycling), delayed or failed ignition, unexpected lockouts, or error codes pointing to the gas valve circuit. Cracked solder joints, moisture damage, and component wear are frequent causes of gas valve control board failure.
Why OEM matters: Gas control is a safety-critical function, and the 56K85 is engineered to Lennox's exact ignition timing and valve specifications. Substitute boards can compromise safe operation, trigger nuisance faults, and void warranties. This factory-original part guarantees correct fit, certified performance, and the safe, reliable heating your Lennox system was built to deliver.
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