OEM Lennox Fan/Blower Control Board Kit — 46K65
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The genuine OEM Lennox 46K65 fan blower control board kit is the electronic brain that manages blower operation in your Lennox furnace or air handler. It sequences heating and cooling calls, controls blower on/off delays, monitors safety inputs, and coordinates fan speed to deliver consistent, efficient airflow. Supplied as a complete kit, it includes the components needed for a clean, reliable replacement.
A failing 46K65 control board can cause a blower that won't start or won't shut off, intermittent operation, erratic fan speeds, blank or flashing diagnostic LEDs, or a system that ignites but never delivers air. Voltage spikes, heat stress, and aged relays or solder joints are common causes of board failure.
Using the OEM Lennox 46K65 kit ensures the exact firmware, relay ratings, terminal layout, and plug connections your system expects. Universal boards frequently require rewiring and may not support Lennox-specific timing or safety logic, risking improper operation. The factory 46K65 restores correct blower control and protects the reliability of 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