Lennox 71W44 Limit Switch
The Lennox 71W44 Limit Switch is a critical OEM safety component engineered for precise thermal regulation in residential gas furnaces and air handlers. This L145-30F limit switch is designed to monitor discharge air temperatures, automatically breaking the electrical circuit if the internal plenum temperature exceeds the 145°F safety threshold. Once the system cools to 115°F, the switch features an automatic reset function to restore operation without manual intervention. Built to rigorous Lennox 102857-04 specifications, this stilt-mount control ensures high-limit protection and system longevity by preventing heat exchanger overheating. It is a direct-fit replacement for numerous models in the Lennox EL195DF, EL296DF, and 95AF1UH series, providing the reliability required by HVAC professionals for demanding maintenance and emergency repairs.
Key Benefits for Technicians- Precise Thermal Calibration: Factory-set to open at 145°F and close at 115°F for consistent furnace high limit protection.
- Broad System Compatibility: Serves as an OEM replacement part for many Lennox, Armstrong, and Ducane heating units.
- Durable Stilt-Mount Design: Features a 5-inch overall length (OAL) and blue sleeve for easy identification and HVAC limit control installation.
- Enhanced Operational Safety: Prevents critical component failure by managing temperature limit switch cycles effectively.
What causes a Lennox 71W44 limit switch to trip frequently?
A frequent trip usually indicates restricted airflow due to a dirty air filter, blocked return air ducts, or a malfunctioning blower motor. If the switch remains open despite normal airflow, the internal bimetal disc may be fatigued, requiring a 71W44 replacement.
Is the Lennox 71W44 an automatic or manual reset switch?
The Lennox 71W44 is an automatic reset limit switch. It will close the circuit once temperatures drop below the 115°F reset point, making it distinct from manual-reset rollout switches.
Can I use the 71W44 in non-Lennox equipment?
Yes, it is often compatible with Allied Air brands including Armstrong, Concord, and Ducane, provided the L145-30F specifications and mounting dimensions match the furnace's original engineering requirements.
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: $34.92
-65%$34.92
$12.22Lennox 71W44 Limit Switch
The Lennox 71W44 Limit Switch is a critical OEM safety component engineered for precise thermal regulation in residential gas furnaces and air handlers. This L145-30F limit switch is designed to monitor discharge air temperatures, automatically breaking the electrical circuit if the internal plenum temperature exceeds the 145°F safety threshold. Once the system cools to 115°F, the switch features an automatic reset function to restore operation without manual intervention. Built to rigorous Lennox 102857-04 specifications, this stilt-mount control ensures high-limit protection and system longevity by preventing heat exchanger overheating. It is a direct-fit replacement for numerous models in the Lennox EL195DF, EL296DF, and 95AF1UH series, providing the reliability required by HVAC professionals for demanding maintenance and emergency repairs.
Key Benefits for Technicians- Precise Thermal Calibration: Factory-set to open at 145°F and close at 115°F for consistent furnace high limit protection.
- Broad System Compatibility: Serves as an OEM replacement part for many Lennox, Armstrong, and Ducane heating units.
- Durable Stilt-Mount Design: Features a 5-inch overall length (OAL) and blue sleeve for easy identification and HVAC limit control installation.
- Enhanced Operational Safety: Prevents critical component failure by managing temperature limit switch cycles effectively.
What causes a Lennox 71W44 limit switch to trip frequently?
A frequent trip usually indicates restricted airflow due to a dirty air filter, blocked return air ducts, or a malfunctioning blower motor. If the switch remains open despite normal airflow, the internal bimetal disc may be fatigued, requiring a 71W44 replacement.
Is the Lennox 71W44 an automatic or manual reset switch?
The Lennox 71W44 is an automatic reset limit switch. It will close the circuit once temperatures drop below the 115°F reset point, making it distinct from manual-reset rollout switches.
Can I use the 71W44 in non-Lennox equipment?
Yes, it is often compatible with Allied Air brands including Armstrong, Concord, and Ducane, provided the L145-30F specifications and mounting dimensions match the furnace's original engineering requirements.
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 71W44 Limit Switch is a critical OEM safety component engineered for precise thermal regulation in residential gas furnaces and air handlers. This L145-30F limit switch is designed to monitor discharge air temperatures, automatically breaking the electrical circuit if the internal plenum temperature exceeds the 145°F safety threshold. Once the system cools to 115°F, the switch features an automatic reset function to restore operation without manual intervention. Built to rigorous Lennox 102857-04 specifications, this stilt-mount control ensures high-limit protection and system longevity by preventing heat exchanger overheating. It is a direct-fit replacement for numerous models in the Lennox EL195DF, EL296DF, and 95AF1UH series, providing the reliability required by HVAC professionals for demanding maintenance and emergency repairs.
Key Benefits for Technicians- Precise Thermal Calibration: Factory-set to open at 145°F and close at 115°F for consistent furnace high limit protection.
- Broad System Compatibility: Serves as an OEM replacement part for many Lennox, Armstrong, and Ducane heating units.
- Durable Stilt-Mount Design: Features a 5-inch overall length (OAL) and blue sleeve for easy identification and HVAC limit control installation.
- Enhanced Operational Safety: Prevents critical component failure by managing temperature limit switch cycles effectively.
What causes a Lennox 71W44 limit switch to trip frequently?
A frequent trip usually indicates restricted airflow due to a dirty air filter, blocked return air ducts, or a malfunctioning blower motor. If the switch remains open despite normal airflow, the internal bimetal disc may be fatigued, requiring a 71W44 replacement.
Is the Lennox 71W44 an automatic or manual reset switch?
The Lennox 71W44 is an automatic reset limit switch. It will close the circuit once temperatures drop below the 115°F reset point, making it distinct from manual-reset rollout switches.
Can I use the 71W44 in non-Lennox equipment?
Yes, it is often compatible with Allied Air brands including Armstrong, Concord, and Ducane, provided the L145-30F specifications and mounting dimensions match the furnace's original engineering requirements.
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.
