Lennox 50L68 Control Kit

The Lennox 50L68 Control Kit (LB-96030A) is a critical limit switch assembly engineered for high-performance thermal regulation in residential gas furnaces. As a primary safety component, this limit control kit monitors heat exchanger temperatures to prevent overheating and potential equipment failure. Designed for seamless integration, it serves as a direct replacement for OEM Lennox furnace parts, ensuring your system remains compliant with original factory specifications. This kit is specifically compatible with a wide range of popular Lennox HVAC units, including the 80UHG, 80MGF, and G24M3-75 series. By utilizing a high-temperature limit sensor, the 50L68 facilitates an automatic shut-off of the gas valve if temperatures exceed safe operating parameters, protecting the heat exchanger while maintaining proper airflow via the integrated blower control logic.

• Direct OEM Compatibility: Engineered as a drop-in Lennox 50L68 replacement for LB-96030A, eliminating the need for field modifications.
• Enhanced System Safety: Provides reliable thermal protection for the heat exchanger, preventing 250-code errors and potential cracks.
• Rugged Build Quality: Built with high-grade electrical contacts and a precision-calibrated sensor for long-term cycling in demanding heating environments.
• Broad Model Support: Validated for use across multiple Lennox furnace chassis, reducing the number of kits needed on the service truck.

Which furnace models support the 50L68 kit?
This limit control is primarily used in Lennox 80UHG, 80MGF, and G24M3-75 models. Always verify the part number in the Lennox repair parts list before installation.

Does this switch require a manual reset?
The primary limit in this kit typically functions as an automatic reset switch, though it is often used alongside manual-reset flame rollout switches in a complete safety circuit.

What causes a limit control to trip repeatedly?
Frequent tripping is usually a symptom of restricted airflow, often caused by a clogged filter, a failing blower motor, or an undersized return duct system rather than a faulty switch.

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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.