Description
The Lennox 10M65 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 heating equipment, this limit switch monitors supply-air or heat exchanger temperatures and automatically interrupts the burner circuit when temperatures exceed the set threshold — then resets automatically once safe operating temperatures are restored.
How It Works
The 10M65 limit switch is a safety control device mounted within the furnace air stream or on the heat exchanger. When the sensed temperature rises above the upper limit setpoint, the switch opens the control circuit, shutting down the burner to prevent equipment damage or fire hazard. Upon cooling to a safe level, the auto-reset mechanism restores normal operation without requiring manual intervention.
Key Features
- Auto-reset operation — automatically restores circuit once temperatures return to safe range
- Temperature range: 135°F to 175°F
- Direct OEM replacement for compatible Lennox furnaces
- Protects heat exchanger and furnace components from overheating
- Reliable bimetal sensing element for accurate temperature response
- Compact design for easy installation in tight furnace cavities
Specifications
- SKU / Part Number: 10M65
- Brand: Lennox
- Switch Type: Automatic Reset (AUTO) Limit Switch
- Temperature Range: 135°F – 175°F
- Application: Furnace overheat protection
Application
Ideal for HVAC technicians and service professionals performing maintenance or repair on Lennox furnaces. Always verify compatibility with your specific Lennox model before installation. Consult the equipment service manual for proper mounting location and wiring instructions.
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