Lennox 10W05 Limit Switch
The Lennox 10W05 Limit Switch is a critical OEM replacement part designed to ensure the safe thermal regulation of your furnace or air handler. Engineered for high-reliability applications, this L150-20F temperature limit switch functions as a fail-safe by monitoring the internal heat within the heat exchanger or plenum. Once the air temperature reaches its 150°F cutout point, the internal contacts open to break the heating circuit, preventing potentially hazardous overheating conditions. This fixed-limit control is a genuine Lennox HVAC component, ensuring seamless integration with existing control boards and wiring harnesses without the need for field modifications. If you are seeing a diagnostic fault code for an open limit, verify that airflow isn't restricted by a clogged filter before replacing the switch. The 10W05 replaces older part numbers such as R01851A028 and is commonly found in Lennox, Armstrong Air, and Ducane units. Professionals trust this genuine Lennox 10W05 to restore system safety and prevent premature heat exchanger failure.
Key Benefits for HVAC Professionals
- Precision Thermal Protection: Features a calibrated 150°F open temperature and a 20°F differential for accurate system cycling.
- OEM Compatibility: Precision-fit for Lennox furnace limit switch applications, maintaining the unit's original safety listing.
- Versatile Application: Suitable for use across multiple brands including Armstrong Air, Concord, and Ducane HVAC equipment.
- Durable Construction: Built with high-grade materials to withstand the high-cycle demands of modern high-efficiency furnaces.
- Critical Safety Compliance: Essential for preventing fire hazards and protecting the integrity of the heat exchanger during airflow failure.
Common Questions About the 10W05 Limit Switch
What are the symptoms of a faulty Lennox 10W05?
A failed switch typically results in the furnace blower running continuously while the burners fail to ignite, or the system short-cycling. You may also see a specific flash code on the control board indicating an "Open High Limit Device."
Can I use a higher temperature limit switch as a substitute?
No. The 150°F cutout is specifically selected based on the unit's airflow and heat exchanger design. Using a higher limit can lead to unsafe cabinet temperatures and may damage internal components.
Is the 10W05 a manual reset or auto-reset switch?
The 10W05 is an automatic reset limit switch. It will close the circuit again once the temperature drops by the 20°F differential. If it remains open, the switch has likely failed or the system is still exceeding safe thermal parameters.
This item is not eligible for free shipping.
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: $13.62
-65%$13.62
$4.77Lennox 10W05 Limit Switch
The Lennox 10W05 Limit Switch is a critical OEM replacement part designed to ensure the safe thermal regulation of your furnace or air handler. Engineered for high-reliability applications, this L150-20F temperature limit switch functions as a fail-safe by monitoring the internal heat within the heat exchanger or plenum. Once the air temperature reaches its 150°F cutout point, the internal contacts open to break the heating circuit, preventing potentially hazardous overheating conditions. This fixed-limit control is a genuine Lennox HVAC component, ensuring seamless integration with existing control boards and wiring harnesses without the need for field modifications. If you are seeing a diagnostic fault code for an open limit, verify that airflow isn't restricted by a clogged filter before replacing the switch. The 10W05 replaces older part numbers such as R01851A028 and is commonly found in Lennox, Armstrong Air, and Ducane units. Professionals trust this genuine Lennox 10W05 to restore system safety and prevent premature heat exchanger failure.
Key Benefits for HVAC Professionals
- Precision Thermal Protection: Features a calibrated 150°F open temperature and a 20°F differential for accurate system cycling.
- OEM Compatibility: Precision-fit for Lennox furnace limit switch applications, maintaining the unit's original safety listing.
- Versatile Application: Suitable for use across multiple brands including Armstrong Air, Concord, and Ducane HVAC equipment.
- Durable Construction: Built with high-grade materials to withstand the high-cycle demands of modern high-efficiency furnaces.
- Critical Safety Compliance: Essential for preventing fire hazards and protecting the integrity of the heat exchanger during airflow failure.
Common Questions About the 10W05 Limit Switch
What are the symptoms of a faulty Lennox 10W05?
A failed switch typically results in the furnace blower running continuously while the burners fail to ignite, or the system short-cycling. You may also see a specific flash code on the control board indicating an "Open High Limit Device."
Can I use a higher temperature limit switch as a substitute?
No. The 150°F cutout is specifically selected based on the unit's airflow and heat exchanger design. Using a higher limit can lead to unsafe cabinet temperatures and may damage internal components.
Is the 10W05 a manual reset or auto-reset switch?
The 10W05 is an automatic reset limit switch. It will close the circuit again once the temperature drops by the 20°F differential. If it remains open, the switch has likely failed or the system is still exceeding safe thermal parameters.
This item is not eligible for free shipping.
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.
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Description
The Lennox 10W05 Limit Switch is a critical OEM replacement part designed to ensure the safe thermal regulation of your furnace or air handler. Engineered for high-reliability applications, this L150-20F temperature limit switch functions as a fail-safe by monitoring the internal heat within the heat exchanger or plenum. Once the air temperature reaches its 150°F cutout point, the internal contacts open to break the heating circuit, preventing potentially hazardous overheating conditions. This fixed-limit control is a genuine Lennox HVAC component, ensuring seamless integration with existing control boards and wiring harnesses without the need for field modifications. If you are seeing a diagnostic fault code for an open limit, verify that airflow isn't restricted by a clogged filter before replacing the switch. The 10W05 replaces older part numbers such as R01851A028 and is commonly found in Lennox, Armstrong Air, and Ducane units. Professionals trust this genuine Lennox 10W05 to restore system safety and prevent premature heat exchanger failure.
Key Benefits for HVAC Professionals
- Precision Thermal Protection: Features a calibrated 150°F open temperature and a 20°F differential for accurate system cycling.
- OEM Compatibility: Precision-fit for Lennox furnace limit switch applications, maintaining the unit's original safety listing.
- Versatile Application: Suitable for use across multiple brands including Armstrong Air, Concord, and Ducane HVAC equipment.
- Durable Construction: Built with high-grade materials to withstand the high-cycle demands of modern high-efficiency furnaces.
- Critical Safety Compliance: Essential for preventing fire hazards and protecting the integrity of the heat exchanger during airflow failure.
Common Questions About the 10W05 Limit Switch
What are the symptoms of a faulty Lennox 10W05?
A failed switch typically results in the furnace blower running continuously while the burners fail to ignite, or the system short-cycling. You may also see a specific flash code on the control board indicating an "Open High Limit Device."
Can I use a higher temperature limit switch as a substitute?
No. The 150°F cutout is specifically selected based on the unit's airflow and heat exchanger design. Using a higher limit can lead to unsafe cabinet temperatures and may damage internal components.
Is the 10W05 a manual reset or auto-reset switch?
The 10W05 is an automatic reset limit switch. It will close the circuit again once the temperature drops by the 20°F differential. If it remains open, the switch has likely failed or the system is still exceeding safe thermal parameters.
This item is not eligible for free shipping.
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.
