Lennox 71W49 Rollout Switch
The Lennox 71W49 Rollout Switch is a critical safety component designed for high-temperature detection within the burner vestibule of Lennox gas furnaces. This manual reset rollout switch features an SPST (Single Pole Single Throw) configuration and is calibrated to open at a fixed temperature of 210 degrees Fahrenheit. Engineered as a direct replacement part, the 71W49 monitors for flame rollout conditions—often caused by cracked heat exchangers or flue blockages—and breaks the 24V furnace control circuit to prevent hazardous operation. This Lennox replacement rollout switch is frequently utilized in G23, G26, G32, and G40 series units. Professional installation is required to ensure the limit switch is positioned correctly for heat rise detection. For contractors troubleshooting ignition failure or limit circuit lockouts, verifying the continuity of this furnace safety sensor is a standard diagnostic step during seasonal maintenance or emergency repairs.
Key Benefits- Precise Calibration: Fixed 210°F trip point ensures rapid response to abnormal heat concentrations.
- Manual Reset Mechanism: Requires technician intervention to investigate the root cause of the rollout before the system can be restarted.
- OEM Compatibility: Genuine Lennox part ensures exact fit and electrical alignment with factory wiring harnesses.
- Durable Construction: Built to withstand the harsh thermal environment of the burner compartment.
How do I diagnose a tripped 71W49 rollout switch?
Check for continuity across the terminals using a multimeter. If the circuit is open and the furnace is cold, press the center button to manual reset; if it trips again, inspect the heat exchanger and venting for blockages.
What causes a 210-degree rollout switch to open?
Common triggers include a restricted primary heat exchanger, a backed-up flue, or insufficient combustion air causing flames to roll out of the burner intake.
Can I bypass this switch for testing purposes?
Jumpering a safety switch is never recommended for permanent operation. It should only be done briefly by a qualified technician to confirm the switch is the point of circuit interruption.
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: $18.24
-65%$18.24
$6.38Lennox 71W49 Rollout Switch
The Lennox 71W49 Rollout Switch is a critical safety component designed for high-temperature detection within the burner vestibule of Lennox gas furnaces. This manual reset rollout switch features an SPST (Single Pole Single Throw) configuration and is calibrated to open at a fixed temperature of 210 degrees Fahrenheit. Engineered as a direct replacement part, the 71W49 monitors for flame rollout conditions—often caused by cracked heat exchangers or flue blockages—and breaks the 24V furnace control circuit to prevent hazardous operation. This Lennox replacement rollout switch is frequently utilized in G23, G26, G32, and G40 series units. Professional installation is required to ensure the limit switch is positioned correctly for heat rise detection. For contractors troubleshooting ignition failure or limit circuit lockouts, verifying the continuity of this furnace safety sensor is a standard diagnostic step during seasonal maintenance or emergency repairs.
Key Benefits- Precise Calibration: Fixed 210°F trip point ensures rapid response to abnormal heat concentrations.
- Manual Reset Mechanism: Requires technician intervention to investigate the root cause of the rollout before the system can be restarted.
- OEM Compatibility: Genuine Lennox part ensures exact fit and electrical alignment with factory wiring harnesses.
- Durable Construction: Built to withstand the harsh thermal environment of the burner compartment.
How do I diagnose a tripped 71W49 rollout switch?
Check for continuity across the terminals using a multimeter. If the circuit is open and the furnace is cold, press the center button to manual reset; if it trips again, inspect the heat exchanger and venting for blockages.
What causes a 210-degree rollout switch to open?
Common triggers include a restricted primary heat exchanger, a backed-up flue, or insufficient combustion air causing flames to roll out of the burner intake.
Can I bypass this switch for testing purposes?
Jumpering a safety switch is never recommended for permanent operation. It should only be done briefly by a qualified technician to confirm the switch is the point of circuit interruption.
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 71W49 Rollout Switch is a critical safety component designed for high-temperature detection within the burner vestibule of Lennox gas furnaces. This manual reset rollout switch features an SPST (Single Pole Single Throw) configuration and is calibrated to open at a fixed temperature of 210 degrees Fahrenheit. Engineered as a direct replacement part, the 71W49 monitors for flame rollout conditions—often caused by cracked heat exchangers or flue blockages—and breaks the 24V furnace control circuit to prevent hazardous operation. This Lennox replacement rollout switch is frequently utilized in G23, G26, G32, and G40 series units. Professional installation is required to ensure the limit switch is positioned correctly for heat rise detection. For contractors troubleshooting ignition failure or limit circuit lockouts, verifying the continuity of this furnace safety sensor is a standard diagnostic step during seasonal maintenance or emergency repairs.
Key Benefits- Precise Calibration: Fixed 210°F trip point ensures rapid response to abnormal heat concentrations.
- Manual Reset Mechanism: Requires technician intervention to investigate the root cause of the rollout before the system can be restarted.
- OEM Compatibility: Genuine Lennox part ensures exact fit and electrical alignment with factory wiring harnesses.
- Durable Construction: Built to withstand the harsh thermal environment of the burner compartment.
How do I diagnose a tripped 71W49 rollout switch?
Check for continuity across the terminals using a multimeter. If the circuit is open and the furnace is cold, press the center button to manual reset; if it trips again, inspect the heat exchanger and venting for blockages.
What causes a 210-degree rollout switch to open?
Common triggers include a restricted primary heat exchanger, a backed-up flue, or insufficient combustion air causing flames to roll out of the burner intake.
Can I bypass this switch for testing purposes?
Jumpering a safety switch is never recommended for permanent operation. It should only be done briefly by a qualified technician to confirm the switch is the point of circuit interruption.
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.
