OEM Lennox Furnace Limit Switch — 69W38
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The genuine OEM Lennox 69W38 limit switch is a temperature-activated safety control that protects your Lennox furnace's heat exchanger from overheating. It monitors the temperature of the supply air and de-energizes the burners or heating elements if the unit exceeds its safe operating range, serving as a critical last line of defense against thermal damage and unsafe conditions.
Common failure symptoms: A worn or failed 69W38 typically results in short cycling, a furnace that won't ignite, a blower that never shuts off, or a high-limit fault code on the control board. Because the switch trips on temperature, a unit with restricted airflow or a failing switch will often lock out mid-cycle.
Why OEM matters: Each Lennox limit switch is set to a model-specific cut-out temperature. The OEM 69W38 delivers the exact calibration, terminal layout, and mounting fit specified by the factory — eliminating the risk of nuisance trips or defeated overheat protection that comes with generic aftermarket switches.
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