Amana-Goodman 10728324 Limit Switch

When you're troubleshooting a furnace that's tripping on high limit, you need a reliable OEM furnace replacement limit switch to restore safe operation. The Amana-Goodman 10728324 Limit Switch—specifically the L135-40F model—is a critical safety component designed to monitor plenum temperatures. This 75-135F auto limit switch operates on a fixed temperature range, opening the circuit at 135°F to kill the burners and automatically resetting once the temperature drops by 40°F (at 95°F). For service technicians, this part is a direct Goodman furnace limit switch replacement for a wide range of Amana, Goodman, and Janitrol gas furnaces. It ensures the heat exchanger does not exceed thermal limits, preventing structural damage and ensuring HVAC system safety. Built with a durable metal flange and standard 1/4 inch terminals, it offers a high-accuracy thermal response for consistent furnace high limit protection in residential applications.

• Direct OEM Fit: Guaranteed compatibility with Goodman, Amana, and Janitrol furnace models requiring an L135-40F specification.
• Automatic Reset Logic: Features 75-135F auto limit switch functionality, eliminating the need for manual intervention after a temporary overheat event.
• Critical Safety Performance: Engineered as a furnace high limit protection device to interrupt the burner circuit if airflow is restricted or temperatures spike.
• Standard Hardware: Includes a fixed mounting flange and spade terminals for rapid field replacement during emergency service calls.

What causes a 10728324 limit switch to trip?
In most cases, the switch trips due to restricted airflow caused by a dirty air filter, a failing blower motor, or blocked return ducts. If the switch fails electrically, it may stay open and prevent the furnace from firing.

Is the Goodman 10728324 an auto-reset or manual-reset switch?
This is an automatic reset switch. It will close the circuit once the sensed temperature falls 40°F below the 135°F trip point.

Can I use this switch if my old part has a different temperature rating?
No. For safety and performance, always match the HVAC thermal limit switch temperature rating specified by the manufacturer's technical data sheet for your specific model.

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.