Description
The Lennox 27H87 is a genuine OEM auto reset limit switch designed to protect furnaces and heating equipment from dangerous overheating conditions. With a temperature operating range of 120°F to 160°F, this limit switch automatically resets once safe temperatures are restored, minimizing downtime and service calls.
Key Features
- Auto reset operation — automatically resets when temperature returns to safe range
- Temperature range: 120°F – 160°F
- Genuine Lennox OEM replacement part (SKU: 27H87)
- Protects heat exchangers and furnace components from thermal damage
- Direct drop-in replacement for compatible Lennox heating systems
How It Works
The limit switch continuously monitors the air temperature within the furnace plenum or heat exchanger area. If temperatures exceed the set point, the switch opens the circuit to shut down the burner or blower, preventing equipment damage and potential safety hazards. Once temperatures fall back within the acceptable range, the auto reset function restores normal operation without manual intervention.
Application
- Compatible with select Lennox furnaces and air handlers
- Ideal for residential and light commercial heating systems
- Recommended for use by qualified HVAC technicians
Why Choose Genuine OEM?
Using a genuine Lennox replacement limit switch ensures proper fit, reliable performance, and maintains manufacturer warranty compliance. Aftermarket substitutes may not meet the precise calibration requirements of your Lennox system.
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