Description
Lennox 44L72 AUTO Limit Switch Overview
The Lennox 44L72 is an automatic (AUTO) reset limit switch engineered to protect furnaces and heating systems from dangerous overtemperature conditions. With a temperature operating range of 100°F to 145°F, this limit switch monitors heat exchanger or plenum temperatures and automatically interrupts the burner circuit when temperatures exceed the safe threshold — then resets automatically once conditions return to normal.
Key Features
- AUTO reset operation — automatically resets once temperature drops back into safe range
- Temperature range: 100°F – 145°F
- OEM Lennox replacement part (SKU: 44L72)
- Designed to protect furnace heat exchangers from overheating damage
- Reliable, direct-replacement design for compatible Lennox heating equipment
Application
The 44L72 limit switch is a direct OEM replacement for compatible Lennox furnaces and heating systems. It is installed in the supply air plenum or on the heat exchanger to sense air or surface temperature. When temperatures rise above the set point, the switch opens the control circuit to shut down the burner, preventing equipment damage and potential safety hazards. The automatic reset feature restores normal operation once the unit cools to a safe temperature.
Why Choose the Lennox 44L72
- Genuine Lennox OEM part ensures proper fit and function
- Protects equipment investment by preventing overtemperature damage
- AUTO reset reduces service calls caused by nuisance manual-reset lockouts
- Ideal for HVAC technicians servicing Lennox residential and light commercial heating equipment
