Lennox 56W20 Limit Switch
The Lennox 56W20 Limit Switch is a critical safety component designed for precise thermal regulation within residential and commercial HVAC systems. This OEM furnace limit switch serves as a direct replacement for legacy part numbers R46105-011 and R46105-001, ensuring seamless mechanical and logical integration. Engineered with a normally closed SPDT contact configuration, the 56W20 features a 3-inch stilt-style probe that monitors air temperature at the heat source. The switch is calibrated to open on temperature rise at 150°F to prevent over-temperature conditions and protect the heat exchanger. Once temperatures normalize, the automatic reset triggers as the internal bimetallic strip cools, allowing the circuit to close on temperature drop at 120°F. This 15A 125/250VAC rated component is essential for maintaining system integrity and operational safety standards in Lennox furnace troubleshooting and repair. Its violet sleeve identification and surface-mount design allow for rapid field identification and installation by technicians.
Key Benefits- Direct OEM Compatibility: Specifically designed to replace obsolete Lennox R46105-011 and R46105-001 parts without field modification.
- Precise Thermal Control: Fixed 120-150F range provides a reliable safety buffer to prevent system overheating.
- Automatic Reset Logic: Features a 30°F differential (L150-30F) that resets the heating circuit automatically once safe temperatures are reached.
- Durable Construction: Built for high-cycle reliability in demanding heating environments with standard screw terminal connections.
- What does a 120-150F rating mean for this switch? This indicates the switch will break the electrical circuit if the temperature hits 150°F and will automatically reconnect once the sensor cools down to 120°F.
- Can I use the 56W20 for Armstrong or Ducane units? Yes, this part is a direct cross-reference for several Allied Air brands, including Armstrong, Ducane, and Concord, that utilize the R46105 series switches.
- How do I verify if the limit switch is tripped? A technician should check for continuity across the terminals; if the switch is open at room temperature, the internal bimetallic element may be failed or the unit has not reached the 120°F reset point.
Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.
Original: $9.68
-65%$9.68
$3.39Lennox 56W20 Limit Switch
The Lennox 56W20 Limit Switch is a critical safety component designed for precise thermal regulation within residential and commercial HVAC systems. This OEM furnace limit switch serves as a direct replacement for legacy part numbers R46105-011 and R46105-001, ensuring seamless mechanical and logical integration. Engineered with a normally closed SPDT contact configuration, the 56W20 features a 3-inch stilt-style probe that monitors air temperature at the heat source. The switch is calibrated to open on temperature rise at 150°F to prevent over-temperature conditions and protect the heat exchanger. Once temperatures normalize, the automatic reset triggers as the internal bimetallic strip cools, allowing the circuit to close on temperature drop at 120°F. This 15A 125/250VAC rated component is essential for maintaining system integrity and operational safety standards in Lennox furnace troubleshooting and repair. Its violet sleeve identification and surface-mount design allow for rapid field identification and installation by technicians.
Key Benefits- Direct OEM Compatibility: Specifically designed to replace obsolete Lennox R46105-011 and R46105-001 parts without field modification.
- Precise Thermal Control: Fixed 120-150F range provides a reliable safety buffer to prevent system overheating.
- Automatic Reset Logic: Features a 30°F differential (L150-30F) that resets the heating circuit automatically once safe temperatures are reached.
- Durable Construction: Built for high-cycle reliability in demanding heating environments with standard screw terminal connections.
- What does a 120-150F rating mean for this switch? This indicates the switch will break the electrical circuit if the temperature hits 150°F and will automatically reconnect once the sensor cools down to 120°F.
- Can I use the 56W20 for Armstrong or Ducane units? Yes, this part is a direct cross-reference for several Allied Air brands, including Armstrong, Ducane, and Concord, that utilize the R46105 series switches.
- How do I verify if the limit switch is tripped? A technician should check for continuity across the terminals; if the switch is open at room temperature, the internal bimetallic element may be failed or the unit has not reached the 120°F reset point.
Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.
Product Information
Product Information
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Shipping & Returns
Description
The Lennox 56W20 Limit Switch is a critical safety component designed for precise thermal regulation within residential and commercial HVAC systems. This OEM furnace limit switch serves as a direct replacement for legacy part numbers R46105-011 and R46105-001, ensuring seamless mechanical and logical integration. Engineered with a normally closed SPDT contact configuration, the 56W20 features a 3-inch stilt-style probe that monitors air temperature at the heat source. The switch is calibrated to open on temperature rise at 150°F to prevent over-temperature conditions and protect the heat exchanger. Once temperatures normalize, the automatic reset triggers as the internal bimetallic strip cools, allowing the circuit to close on temperature drop at 120°F. This 15A 125/250VAC rated component is essential for maintaining system integrity and operational safety standards in Lennox furnace troubleshooting and repair. Its violet sleeve identification and surface-mount design allow for rapid field identification and installation by technicians.
Key Benefits- Direct OEM Compatibility: Specifically designed to replace obsolete Lennox R46105-011 and R46105-001 parts without field modification.
- Precise Thermal Control: Fixed 120-150F range provides a reliable safety buffer to prevent system overheating.
- Automatic Reset Logic: Features a 30°F differential (L150-30F) that resets the heating circuit automatically once safe temperatures are reached.
- Durable Construction: Built for high-cycle reliability in demanding heating environments with standard screw terminal connections.
- What does a 120-150F rating mean for this switch? This indicates the switch will break the electrical circuit if the temperature hits 150°F and will automatically reconnect once the sensor cools down to 120°F.
- Can I use the 56W20 for Armstrong or Ducane units? Yes, this part is a direct cross-reference for several Allied Air brands, including Armstrong, Ducane, and Concord, that utilize the R46105 series switches.
- How do I verify if the limit switch is tripped? A technician should check for continuity across the terminals; if the switch is open at room temperature, the internal bimetallic element may be failed or the unit has not reached the 120°F reset point.
Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.
