Description
Lennox 10M80 AUTO Limit Switch Overview
The Lennox 10M80 is an OEM replacement AUTO (automatic reset) limit switch designed to protect furnaces and heating systems from dangerous overheating conditions. With a temperature operating range of 100–140°F, this limit switch monitors heat exchanger or plenum temperatures and automatically interrupts the burner circuit when temperatures exceed the set point — then resets itself once safe temperatures are restored.
Key Features
- AUTO (automatic reset) operation for convenient, hands-free recovery
- Temperature range: 100°F to 140°F
- Genuine Lennox OEM replacement part (SKU: 10M80)
- Designed to protect furnace heat exchangers from thermal overload
- Interrupts burner operation upon reaching the set-point temperature
- Restores normal furnace operation automatically once temperatures normalize
Application
The 10M80 limit switch is a direct OEM replacement for compatible Lennox furnace models. It is installed in the furnace plenum or on the heat exchanger to continuously monitor operating temperatures. If the system overheats due to restricted airflow, a dirty filter, or other issues, the switch opens the circuit to shut down the burner, preventing equipment damage and potential safety hazards.
Why Choose OEM?
Using a genuine Lennox OEM limit switch ensures proper fit, reliable performance, and compatibility with your existing Lennox heating system — maintaining manufacturer warranty compliance and system integrity.
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