OEM Lennox Furnace Limit Switch — 97J67
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The genuine OEM Lennox 97J67 limit switch is a high-temperature safety control that guards your furnace against overheating. Positioned to read heat exchanger and plenum temperatures, it opens the burner circuit the moment temperatures rise beyond the safe limit — usually a sign of restricted airflow or blower trouble — protecting the heat exchanger and your home.
A worn or defective limit switch typically causes short cycling, the furnace shutting down before the thermostat is satisfied, the blower running continuously, or an outright no-heat condition. Because it's a safety device, a malfunctioning switch will lock the system out until the fault is corrected.
Fitting an OEM Lennox 97J67 guarantees the switch trips at the exact temperature your furnace model specifies, with the correct dimensions and terminals for a direct fit. Generic substitutes with mismatched setpoints can permit unsafe operation or trigger frustrating nuisance shutdowns. For proper protection and precise compatibility, rely on the factory-original part 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