Description
The Lennox 83L86 is an OEM-grade automatic reset limit switch engineered to protect furnaces and heating systems from dangerous overtemperature conditions. Designed as a direct replacement for compatible Lennox equipment, this limit switch monitors heat exchanger temperatures and interrupts the burner circuit when temperatures exceed the rated threshold, then automatically resets once safe operating temperatures are restored — eliminating the need for manual intervention.
How It Works
The limit switch continuously senses the temperature within the furnace plenum or heat exchanger area. If the temperature rises to the upper trip point (250°F), the switch opens the control circuit, shutting down the burner to prevent equipment damage or fire hazard. Once the temperature drops back to the reset point (220°F), the switch automatically closes, restoring normal operation.
Key Features
- Auto reset operation — no manual reset required after a trip event
- Temperature range: 220°F reset / 250°F trip point
- OEM Lennox replacement part (SKU: 83L86)
- Protects heat exchangers and furnace components from overheating
- Direct drop-in replacement for compatible Lennox furnace models
- Reliable bimetal sensing element for accurate temperature response
Application
The Lennox 83L86 limit switch is ideal for use in residential and light commercial gas furnaces where overtemperature protection is required. Always verify compatibility with your specific Lennox furnace model before installation.
Why Choose the Lennox 83L86?
Using a genuine Lennox OEM limit switch ensures proper fit, accurate calibration, and long-term reliability. Aftermarket substitutes may not meet the precise temperature tolerances required for safe furnace operation. Trust the 83L86 to deliver consistent, code-compliant overheat protection for your Lennox heating system.
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