Description
The Lennox 46K69 is an automatic (AUTO) reset limit switch engineered to protect furnace heat exchangers and related HVAC equipment from damaging overtemperature conditions. Designed as a direct OEM replacement for compatible Lennox systems, this limit switch monitors operating temperatures and automatically interrupts the burner circuit when temperatures exceed the safe threshold, then resets once conditions return to normal — providing continuous, reliable overheat protection without manual intervention.
Key Features
- AUTO (automatic) reset operation — restores normal function once temperature drops to safe levels
- Temperature range: 150°F to 180°F operating limit
- Direct OEM replacement for compatible Lennox furnaces and heating equipment
- Interrupts burner circuit on overtemperature to prevent heat exchanger damage
- Reliable bimetal sensing element for accurate, consistent trip response
- Compact design for straightforward installation in tight equipment spaces
Application
The 46K69 limit switch is intended for use in Lennox gas furnaces and other heating appliances where overheat protection is required. It is mounted in the supply air plenum or heat exchanger area and wired in series with the burner control circuit. When the sensed temperature reaches the set limit, the switch opens the circuit, shutting down the burner until the temperature falls back within the safe operating range.
Specifications
- SKU: 46K69
- Brand: Lennox
- Switch Type: AUTO (automatic) reset limit switch
- Temperature Range: 150°F – 180°F
- Application: Lennox furnaces and compatible heating equipment
Why Choose the Lennox 46K69?
Using a genuine Lennox OEM limit switch ensures proper fit, accurate calibration, and dependable performance. Aftermarket substitutes may not match the precise trip point or form factor required by your equipment. The 46K69 delivers the protection your system was designed to rely on, helping extend equipment life and maintain safe operation season after season.
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