Amana-Goodman 10728325 Limit Switch

The Amana-Goodman 10728325 Limit Switch is a critical safety component designed for specific furnace applications, functioning as a primary high-limit control to prevent heat exchanger overheating. This 130-170F AUTO limit switch operates on a fixed temperature logic, automatically opening the electrical circuit if internal plenum temperatures exceed the 170°F threshold and resetting once the system cools to 130°F. Engineered for high-cycle reliability in residential HVAC systems, this OEM Goodman replacement part ensures precise thermal response times. When troubleshooting frequent furnace limit switch tripping, it is essential to verify static pressure and airflow across the coil, as this switch is calibrated to detect restricted return air or blower motor failure. This HVAC high limit sensor features standard spade terminals for rapid integration into existing wiring harnesses, maintaining the factory safety sequence of operation for Amana and Goodman gas furnaces.

• Factory Calibrated 170°F Cut-out: Provides accurate thermal protection to prevent heat exchanger stress and potential cracks.
• Automatic Reset Function: The 130°F reset point allows for automated system recovery once safe operating temperatures are restored.
• OEM Compatibility: Engineered as a direct drop-in replacement for Amana-Goodman 10728325, ensuring proper fitment and mounting hole alignment.
• Enhanced Durability: Built to withstand the high-temperature environment of the furnace vestibule without premature fatigue.

How do I know if my furnace limit switch is bad?
If the furnace blower runs continuously while the burners fail to ignite, or if the system cycles on the limit frequently despite clean filters, the 10728325 switch may have developed high internal resistance or a weakened bimetal disc.

What causes a 170 degree limit switch to trip?
Common causes include a clogged 1-inch pleated filter, undersized ductwork, a failing capacitor on the indoor blower motor, or soot buildup on the secondary heat exchanger restricting airflow.

Is the Goodman 10728325 switch interchangeable?
It is critical to match the temperature rating exactly. Replacing a 170 degree limit switch with a higher-rated component can lead to unsafe operating conditions and compromised equipment integrity.

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.