OEM Lennox Limit Switch — 56L60
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The Lennox 56L60 limit switch is a temperature-sensing safety control that protects your furnace from overheating. Mounted near the heat exchanger, it monitors plenum temperature and opens the circuit to shut down the burners if things get too hot — most commonly when airflow drops due to a dirty filter or a failed blower. It's a critical safety device calibrated to your Lennox unit's exact trip point.
A failing 56L60 often causes short cycling on heat, the furnace shutting down mid-cycle, or no heat at all if the switch fails open. A switch that trips repeatedly can also be flagging a real airflow or heat-exchanger problem worth investigating.
OEM is essential on a safety control. The genuine Lennox 56L60 is set to the precise open/close temperatures your furnace requires — a generic switch with the wrong setpoint can nuisance-trip or, worse, fail to protect the equipment. Install the factory part to keep your Lennox furnace both safe and reliable.
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