Lennox 44L72 – 145F-40 Fixed Control Limit Switch
Maintain optimal safety and system integrity with the Lennox 44L72 Control Limit Switch, a critical component engineered to prevent overheating in your HVAC equipment. This OEM-rated limit switch features a fixed temperature cut-out at 145°F with an automatic reset differential of 40°F, ensuring timely reactivation once safe operating conditions return.
The 44L72 is a snap-disc style bimetal limit switch, which responds accurately to changes in temperature and interrupts the electrical circuit to the burner or heating element when excessive heat is detected. This helps to protect your furnace from heat-related damage, enhances overall performance, and ensures compliance with safety regulations.
Technical Specifications:
- Cut-Out Temperature: 145°F (62.7°C)
- Reset Differential: 40°F
- Switch Type: Auto-reset
- Mounting: Surface mount with screw terminals
- Application: Furnace high limit control
- OEM Part Number: 44L72
- Replaces Part Numbers: May be cross-compatible with other Lennox or White Rodgers models (check equipment manual)
Applications:
The Lennox 44L72 is commonly installed in residential gas furnaces, air handlers, and heating units, serving as a high-limit temperature safeguard. Its auto-reset design allows the switch to reopen the circuit once temperature levels drop to a safe range, making it ideal for continuous-use systems.
The Lennox 44L72 is commonly installed in residential gas furnaces, air handlers, and heating units, serving as a high-limit temperature safeguard. Its auto-reset design allows the switch to reopen the circuit once temperature levels drop to a safe range, making it ideal for continuous-use systems.
Why Choose the Lennox 44L72?
- Precision-engineered for consistent and reliable temperature control
- Genuine OEM part ensures compatibility and longevity
- Protects HVAC systems from thermal overload and component failure
- Supports safe furnace operation in compliance with industry standards
Installation Note:
Always disconnect power before servicing. Installation should be performed by a qualified HVAC technician to ensure correct placement and secure electrical connections.
Always disconnect power before servicing. Installation should be performed by a qualified HVAC technician to ensure correct placement and secure electrical connections.
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