Amana-Goodman 1370900S Limit Switch

The Amana-Goodman 1370900S Limit Switch is a critical safety component designed for precise thermal regulation within the GSMS080-4 and GSM-080-4 model series. Engineered for seamless integration into Goodman and Amana furnace systems, this normally closed (NC) thermal switch acts as a primary safety boundary for the heat exchanger. The B1370910S limit switch is calibrated to trigger at a 170-degree Fahrenheit cutout temperature, effectively interrupting the furnace circuit to prevent overheating and potential heat exchanger fatigue. As a direct OEM replacement HVAC part, this switch ensures that your HVAC high-limit switch troubleshooting follows factory-specified safety parameters. For technicians performing furnace limit switch replacement, this component provides the exact thermal response curve required for 80% AFUE horizontal and vertical gas furnaces. Utilizing genuine Amana furnace parts maintains the UL certification and operational integrity of the appliance while ensuring consistent flame rollout and blower timing sequences remain within technical specifications.

• Critical Safety Cutout: Calibrated to break the electrical circuit at 170°F to prevent equipment damage.
• OEM Compatibility: Specifically engineered for Amana and Goodman gas furnaces, ensuring correct pin configuration and mounting alignment.
• High-Temperature Durability: Built to withstand the harsh thermal environment of the heat exchanger cabinet.
• Drop-in Replacement: Matches the technical specifications of the original B1370910S for rapid field installation.

What causes a 170 degree limit switch to trip frequently?
Repeated tripping is usually indicative of restricted airflow, often caused by a dirty air filter, blocked return vents, a failing blower motor, or an oversized furnace for the existing ductwork.

How do I verify if the 1370900S is compatible with my furnace?
Compatibility is determined by the model and serial number of the furnace. This part is verified for the GSMS080-4 and GSM-080-4 series; however, always check the unit's parts manual to ensure the 170-degree rating matches the original spec.

Can I test this switch with a multimeter?
Yes, you should check for continuity across the terminals when the switch is below 170 degrees. If the switch is open at room temperature, the internal thermal disc has failed and requires replacement.

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.