OEM Lennox Furnace Control Board — Y7725
OEM Guaranteed
Same-Day Ship
30-Day Returns
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The genuine OEM Lennox Y7725 control board is the brain of your furnace, coordinating the ignition sequence, gas valve, inducer motor, blower, and safety switches. It reads inputs from the thermostat and safety devices, then times each stage of the heating cycle to deliver safe, efficient operation.
Common failure symptoms: A furnace that won't respond to the thermostat, no ignition or no blower operation, error codes flashing on the diagnostic LED, short cycling, or a blower that runs continuously. Power surges, moisture, and failed relays or fuses on the board are typical causes of failure.
Why OEM matters: The Y7725 is programmed with the exact ignition timing, fan delays, and safety logic Lennox designed for your furnace model. Generic or universal boards may not sequence the components correctly, can bypass critical safeties, and often void your equipment warranty. The factory board guarantees correct pin-out, firmware, and integration with 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