Lennox 13W23 Limit Switch
The Lennox 13W23 Limit Switch is a critical OEM furnace safety control engineered for precise thermal monitoring in residential and light commercial HVAC systems. This auto-reset limit switch is calibrated with an 80°F cut-in and a 140°F cut-out, functioning as a primary fail-safe to interrupt the burner circuit if heat exchanger temperatures exceed safe operating parameters. By utilizing a genuine Lennox replacement part, technicians ensure the blower assembly and combustion sequence maintain factory-specified air temperature rises.
For contractors troubleshooting a furnace limit switch tripping, the 13W23 provides a direct-fit solution for various Lennox G-series and SLP-series units. This component monitors internal plenum temperatures to prevent high-limit conditions caused by restricted airflow or oversized ductwork. Replacing a fouled or out-of-tolerance switch with the Lennox 13W23 restores the integrity of the heat management system, ensuring the equipment operates within its UL-listed safety envelope while avoiding nuisance shutouts during heavy heating cycles.
Key Technical Benefits
- Precision Thermal Calibration: Factory-set 140°F cut-out and 80°F cut-in ensures accurate HVAC high limit protection.
- Automatic Reset Logic: Resumes system operation automatically once temperatures return to safe levels, reducing unnecessary service calls for manual reset furnace switches.
- OEM Compatibility: Specifically designed to meet the electrical and mounting requirements of Lennox furnace models.
- Safety Compliance: Prevents heat exchanger damage and potential fire hazards by monitoring internal system air temperature.
Common Technical Questions
What causes a Lennox 13W23 limit switch to stay open?
An open limit switch typically indicates insufficient airflow over the heat exchanger, often resulting from a dirty secondary heat exchanger, a clogged filter, or a failing blower motor.
Can I substitute this with a generic 140-degree limit switch?
Using the Lennox 13W23 OEM part is recommended to ensure the sensing probe depth and thermal response curve match the original equipment design for proper safety timing.
How do I test the 13W23 for continuity?
A functioning switch should show continuity across the terminals at room temperature. If the switch remains open at 70°F, the internal bimetal disc has likely failed or exceeded its duty cycle.
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.
Lennox 13W23 Limit Switch
The Lennox 13W23 Limit Switch is a critical OEM furnace safety control engineered for precise thermal monitoring in residential and light commercial HVAC systems. This auto-reset limit switch is calibrated with an 80°F cut-in and a 140°F cut-out, functioning as a primary fail-safe to interrupt the burner circuit if heat exchanger temperatures exceed safe operating parameters. By utilizing a genuine Lennox replacement part, technicians ensure the blower assembly and combustion sequence maintain factory-specified air temperature rises.
For contractors troubleshooting a furnace limit switch tripping, the 13W23 provides a direct-fit solution for various Lennox G-series and SLP-series units. This component monitors internal plenum temperatures to prevent high-limit conditions caused by restricted airflow or oversized ductwork. Replacing a fouled or out-of-tolerance switch with the Lennox 13W23 restores the integrity of the heat management system, ensuring the equipment operates within its UL-listed safety envelope while avoiding nuisance shutouts during heavy heating cycles.
Key Technical Benefits
- Precision Thermal Calibration: Factory-set 140°F cut-out and 80°F cut-in ensures accurate HVAC high limit protection.
- Automatic Reset Logic: Resumes system operation automatically once temperatures return to safe levels, reducing unnecessary service calls for manual reset furnace switches.
- OEM Compatibility: Specifically designed to meet the electrical and mounting requirements of Lennox furnace models.
- Safety Compliance: Prevents heat exchanger damage and potential fire hazards by monitoring internal system air temperature.
Common Technical Questions
What causes a Lennox 13W23 limit switch to stay open?
An open limit switch typically indicates insufficient airflow over the heat exchanger, often resulting from a dirty secondary heat exchanger, a clogged filter, or a failing blower motor.
Can I substitute this with a generic 140-degree limit switch?
Using the Lennox 13W23 OEM part is recommended to ensure the sensing probe depth and thermal response curve match the original equipment design for proper safety timing.
How do I test the 13W23 for continuity?
A functioning switch should show continuity across the terminals at room temperature. If the switch remains open at 70°F, the internal bimetal disc has likely failed or exceeded its duty cycle.
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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Description
The Lennox 13W23 Limit Switch is a critical OEM furnace safety control engineered for precise thermal monitoring in residential and light commercial HVAC systems. This auto-reset limit switch is calibrated with an 80°F cut-in and a 140°F cut-out, functioning as a primary fail-safe to interrupt the burner circuit if heat exchanger temperatures exceed safe operating parameters. By utilizing a genuine Lennox replacement part, technicians ensure the blower assembly and combustion sequence maintain factory-specified air temperature rises.
For contractors troubleshooting a furnace limit switch tripping, the 13W23 provides a direct-fit solution for various Lennox G-series and SLP-series units. This component monitors internal plenum temperatures to prevent high-limit conditions caused by restricted airflow or oversized ductwork. Replacing a fouled or out-of-tolerance switch with the Lennox 13W23 restores the integrity of the heat management system, ensuring the equipment operates within its UL-listed safety envelope while avoiding nuisance shutouts during heavy heating cycles.
Key Technical Benefits
- Precision Thermal Calibration: Factory-set 140°F cut-out and 80°F cut-in ensures accurate HVAC high limit protection.
- Automatic Reset Logic: Resumes system operation automatically once temperatures return to safe levels, reducing unnecessary service calls for manual reset furnace switches.
- OEM Compatibility: Specifically designed to meet the electrical and mounting requirements of Lennox furnace models.
- Safety Compliance: Prevents heat exchanger damage and potential fire hazards by monitoring internal system air temperature.
Common Technical Questions
What causes a Lennox 13W23 limit switch to stay open?
An open limit switch typically indicates insufficient airflow over the heat exchanger, often resulting from a dirty secondary heat exchanger, a clogged filter, or a failing blower motor.
Can I substitute this with a generic 140-degree limit switch?
Using the Lennox 13W23 OEM part is recommended to ensure the sensing probe depth and thermal response curve match the original equipment design for proper safety timing.
How do I test the 13W23 for continuity?
A functioning switch should show continuity across the terminals at room temperature. If the switch remains open at 70°F, the internal bimetal disc has likely failed or exceeded its duty cycle.
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.
