Amana-Goodman B1370921 Limit Switch

The Amana-Goodman B1370921 Limit Switch is a critical safety component engineered for forced-air furnaces, featuring a 7-inch insertion length and a precise 210-240F cut-out temperature. This automatic reset limit switch monitors heat exchanger temperatures to prevent overheating, ensuring the HVAC high limit control functions within OEM specifications. Designed as a direct furnace replacement part for brands including Goodman, Amana, Daikin, Kenmore, McQuay, Xenon, GMC, and Gree, it maintains system integrity during heavy thermal cycling. The bimetallic sensor provides accurate thermal overload protection, opening the electrical circuit if internal plenum temperatures exceed safe operating limits. This high-grade OEM limit switch is essential for technicians performing routine maintenance or troubleshooting furnace overheating codes. Verified for electrical compatibility across various residential gas furnaces and heat pump systems, this component ensures the blower assembly and burner ignition sequences operate according to manufacturer safety protocols.

Key Benefits

• Broad Compatibility: Genuine OEM Goodman B1370921 replacement for Amana, Daikin, and Kenmore furnace models.
• Precision Calibration: Features a 240-degree Fahrenheit thermal trip point for reliable high-limit sensing.
• Standardized Fit: 7-inch probe length allows for proper depth placement within the heat exchanger airflow path.
• Automatic Reset: Resumes normal circuit continuity once temperatures drop below the internal reset differential.
• Durable Construction: Built to withstand constant thermal cycling in high-demand HVAC environments.

Common Questions

What are the symptoms of a failing B1370921 limit switch?
Common signs include the furnace blower running continuously or the burners shutting off prematurely (short cycling) before the thermostat reaches the set point.

How do I test this 7-inch limit switch for continuity?
Using a multimeter set to Ohms, check for continuity across the terminals when the switch is cold; it should read as a closed circuit (zero or near-zero resistance).

Can I use a shorter probe if the 7-inch version is unavailable?
No, it is vital to use the specified 7-inch insertion length to ensure the sensor is positioned correctly in the airflow for accurate temperature monitoring.

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.