OEM Lennox Fan Blower Control Board — Y4151
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Same-Day Ship
30-Day Returns
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The genuine OEM Lennox Y4151 fan blower control board governs how and when your indoor blower motor operates, managing heating and cooling blower speeds, on/off delays, and fan-only requests. Built as a direct factory replacement, it drops into compatible Lennox air handlers and furnaces to restore smooth, correctly timed airflow across every operating mode.
A defective blower control board typically shows up as airflow problems. Look for a blower that won't start, runs continuously, cycles on and off unexpectedly, or fails to ramp to the correct speed during a heat or cool call. You may also notice the fan running long after the system shuts down, or no blower response at all despite a live thermostat signal. Relay burnout and surge damage are the usual culprits.
Installing an OEM Lennox board protects your comfort and equipment. The Y4151 is matched to Lennox blower motor speed taps and timing logic, ensuring the delays and speed transitions your system expects. Generic substitutes can mis-time the blower, hurting efficiency and comfort or overheating the heat exchanger. Choose this OEM replacement for guaranteed fit and factory-correct operation. In stock and ready to ship same day.
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