Lennox 29M68 Rollout Switch

The Lennox 29M68 Rollout Switch is a critical safety component engineered for precise thermal monitoring in residential and commercial furnaces. As an OEM Lennox replacement part, this L270F manual reset rollout switch is designed to interrupt the heating cycle if it detects flame rollout or excessive temperatures exceeding its 270-degree Fahrenheit trip point. For technicians troubleshooting a Lennox furnace rollout switch tripped error, this component provides the exact electrical specifications required to maintain circuit integrity and system safety protocols.

Constructed with a robust metal housing to withstand high-heat environments near the burner assembly, the 29M68 ensures a reliable manual reset furnace safety switch interface. This part is compatible with a wide range of Lennox units, including LGB and LGE series models. Using a genuine Lennox 29M68 prevents the common calibration drift issues found in universal alternatives, ensuring the internal disc reacts accurately to combustion deviations. When your diagnostic led flashes indicate an open limit, replacing a fatigued or non-conductive switch with this factory-spec heating system rollout sensor is the standard for professional-grade repairs.

• Factory Calibrated Precision: Fixed 270°F temperature rating ensures the system shuts down immediately during unsafe combustion events.
• Manual Reset Design: Forces a manual inspection of the heat exchanger and burner alignment before the system can be restarted.
• Direct OEM Fitment: Eliminates mounting issues or terminal mismatching, providing a seamless Lennox furnace repair experience.
• Proven Durability: Engineered for the high-cycle thermal stress found in modern high-efficiency furnace burner boxes.

• What causes this switch to trip repeatedly? Frequent tripping usually indicates a cracked heat exchanger, blocked venting, or improper gas pressure (manifold pressure) causing the flame to "roll out" of the combustion chamber.
• Can I bypass this switch for testing? Never bypass a flame rollout switch. It is a safety-critical component; if it is open, there is an underlying combustion or airflow issue that must be addressed.
• How do I verify if the 29M68 is faulty? Use a multimeter to check for continuity across the terminals. If the reset button is depressed but the circuit remains open, the internal bi-metal disc has failed and requires replacement.

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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.