OEM Lennox Fan Blower Control Board — 48K98
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The genuine OEM Lennox 48K98 fan blower control board is the electronic brain that manages blower operation in your Lennox furnace. It controls fan-on and fan-off timing, switches between heating and cooling blower speeds, and coordinates the relays that route line voltage to the indoor motor. Correct board logic is what keeps your system delivering steady, comfortable airflow.
When this control board fails, symptoms include a blower that won't start or won't shut off, incorrect fan timing, no response from the thermostat, tripped breakers, or visible burns and corrosion on the board's relays and traces. Power surges and aging relays are frequent causes.
The OEM 48K98 is programmed with the exact timing profiles and speed-tap wiring your Lennox model expects — parameters aftermarket boards often approximate incorrectly. Installing the factory board ensures proper blower sequencing, protects your motor, and restores dependable operation for your Lennox equipment.
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