OEM Lennox Control Transformer — 96C79
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The genuine OEM Lennox 96C79 transformer supplies the low-voltage control power that keeps your Lennox furnace or air handler operating. It steps incoming line voltage down to the 24V used by your thermostat, control board, gas valve, and relays. Without a healthy transformer, none of the low-voltage circuits in your system can function, making this a critical component in the control chain.
Common failure symptoms: A failed 96C79 transformer often shows up as a completely unresponsive thermostat, no 24V at the control board, a blown low-voltage fuse, or a system that won't power up at all. Overheating, a burnt smell, or a short in downstream wiring can cause the transformer windings to open or short internally.
Why OEM matters: Lennox control circuits are engineered for precise voltage and VA ratings. An OEM 96C79 guarantees the correct secondary output, mounting footprint, and terminal configuration for a direct, worry-free fit — protecting sensitive boards and valves from over- or under-voltage that generic substitutes can introduce. Choosing the factory part preserves your system's reliability and rated performance.
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