Lennox 83L76 Limit Switch
For service technicians addressing furnace short-cycling or thermal cutout issues, the Lennox 83L76 Limit Switch serves as a direct-fit OEM replacement part designed for high-limit circuit protection. This 140-180F AUTO limit switch is engineered with a calibrated bimetal snap disc that opens at 180°F to prevent heat exchanger damage and automatically resets at 140°F once the plenum temperature stabilizes. As a critical furnace safety sensor, it monitors discharge air in residential and commercial Lennox, Armstrong, and Ducane units, replacing obsolete or failing components like the 83L7601 and 83L68. The L180-40F specification ensures precise thermal response, maintaining HVAC system efficiency and preventing hazardous overheating conditions. Featuring standard 1/4" spade terminal connectors and a surface mount flange, this high-limit control allows for rapid installation during emergency calls. This automatic reset switch is essential for restoring proper heating cycles in systems where airflow restrictions or blower failures have triggered professional furnace repair protocols.
Key Benefits for HVAC Contractors- Direct OEM Compatibility: Verified for use in Lennox, Armstrong, and Ducane equipment, ensuring the L180-40F calibration matches the original manufacturer’s safety sequence.
- Reliable Thermal Protection: The 140-180F temperature range provides a 40° differential, reducing nuisance tripping while effectively protecting the heat exchanger.
- Efficient Service Installation: Equipped with standard male spade connectors and a robust mounting flange for quick field replacement in compact furnace cabinets.
- Automatic Reset Logic: Eliminates the need for manual homeowner intervention by re-closing the circuit once temperatures return to 140°F, ensuring continuous operation after a temporary high-heat event.
- How can I tell if my 83L76 is faulty or just doing its job? If the Lennox 83L76 is open, check for restricted airflow (dirty filters, blocked returns) first. If the switch remains open at room temperature, the bimetal disc has failed and the part requires replacement.
- Can I use a manual reset switch to replace this automatic 83L76? No. Safety controls must match the original design intent. This is an automatic reset limit; replacing it with a manual version can disrupt the intended control board logic and operation.
- What are the most common cross-references for this part? This switch is also identified by Lennox part numbers 83L7601, LB-101150A, and 100065-04. Always verify the L180-40 stamping on the old part before installing.
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: $50.52
-65%$50.52
$17.68Lennox 83L76 Limit Switch
For service technicians addressing furnace short-cycling or thermal cutout issues, the Lennox 83L76 Limit Switch serves as a direct-fit OEM replacement part designed for high-limit circuit protection. This 140-180F AUTO limit switch is engineered with a calibrated bimetal snap disc that opens at 180°F to prevent heat exchanger damage and automatically resets at 140°F once the plenum temperature stabilizes. As a critical furnace safety sensor, it monitors discharge air in residential and commercial Lennox, Armstrong, and Ducane units, replacing obsolete or failing components like the 83L7601 and 83L68. The L180-40F specification ensures precise thermal response, maintaining HVAC system efficiency and preventing hazardous overheating conditions. Featuring standard 1/4" spade terminal connectors and a surface mount flange, this high-limit control allows for rapid installation during emergency calls. This automatic reset switch is essential for restoring proper heating cycles in systems where airflow restrictions or blower failures have triggered professional furnace repair protocols.
Key Benefits for HVAC Contractors- Direct OEM Compatibility: Verified for use in Lennox, Armstrong, and Ducane equipment, ensuring the L180-40F calibration matches the original manufacturer’s safety sequence.
- Reliable Thermal Protection: The 140-180F temperature range provides a 40° differential, reducing nuisance tripping while effectively protecting the heat exchanger.
- Efficient Service Installation: Equipped with standard male spade connectors and a robust mounting flange for quick field replacement in compact furnace cabinets.
- Automatic Reset Logic: Eliminates the need for manual homeowner intervention by re-closing the circuit once temperatures return to 140°F, ensuring continuous operation after a temporary high-heat event.
- How can I tell if my 83L76 is faulty or just doing its job? If the Lennox 83L76 is open, check for restricted airflow (dirty filters, blocked returns) first. If the switch remains open at room temperature, the bimetal disc has failed and the part requires replacement.
- Can I use a manual reset switch to replace this automatic 83L76? No. Safety controls must match the original design intent. This is an automatic reset limit; replacing it with a manual version can disrupt the intended control board logic and operation.
- What are the most common cross-references for this part? This switch is also identified by Lennox part numbers 83L7601, LB-101150A, and 100065-04. Always verify the L180-40 stamping on the old part before installing.
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
For service technicians addressing furnace short-cycling or thermal cutout issues, the Lennox 83L76 Limit Switch serves as a direct-fit OEM replacement part designed for high-limit circuit protection. This 140-180F AUTO limit switch is engineered with a calibrated bimetal snap disc that opens at 180°F to prevent heat exchanger damage and automatically resets at 140°F once the plenum temperature stabilizes. As a critical furnace safety sensor, it monitors discharge air in residential and commercial Lennox, Armstrong, and Ducane units, replacing obsolete or failing components like the 83L7601 and 83L68. The L180-40F specification ensures precise thermal response, maintaining HVAC system efficiency and preventing hazardous overheating conditions. Featuring standard 1/4" spade terminal connectors and a surface mount flange, this high-limit control allows for rapid installation during emergency calls. This automatic reset switch is essential for restoring proper heating cycles in systems where airflow restrictions or blower failures have triggered professional furnace repair protocols.
Key Benefits for HVAC Contractors- Direct OEM Compatibility: Verified for use in Lennox, Armstrong, and Ducane equipment, ensuring the L180-40F calibration matches the original manufacturer’s safety sequence.
- Reliable Thermal Protection: The 140-180F temperature range provides a 40° differential, reducing nuisance tripping while effectively protecting the heat exchanger.
- Efficient Service Installation: Equipped with standard male spade connectors and a robust mounting flange for quick field replacement in compact furnace cabinets.
- Automatic Reset Logic: Eliminates the need for manual homeowner intervention by re-closing the circuit once temperatures return to 140°F, ensuring continuous operation after a temporary high-heat event.
- How can I tell if my 83L76 is faulty or just doing its job? If the Lennox 83L76 is open, check for restricted airflow (dirty filters, blocked returns) first. If the switch remains open at room temperature, the bimetal disc has failed and the part requires replacement.
- Can I use a manual reset switch to replace this automatic 83L76? No. Safety controls must match the original design intent. This is an automatic reset limit; replacing it with a manual version can disrupt the intended control board logic and operation.
- What are the most common cross-references for this part? This switch is also identified by Lennox part numbers 83L7601, LB-101150A, and 100065-04. Always verify the L180-40 stamping on the old part before installing.
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.
