Amana-Goodman 1370903S Limit Switch

The Amana-Goodman 1370903S Limit Switch is a critical OEM furnace safety control designed for precise thermal monitoring in HVAC high-limit applications. Engineered for Goodman, Amana, and Janitrol gas furnaces, this stationary limit switch features a 3-inch insertion length and a fixed 240F cut-out temperature. This normally closed (N.C.) sensor is a vital component for furnace troubleshooting, specifically addressing limit switch tripping issues caused by restricted airflow or cracked heat exchangers. Operating on a standard 24V control circuit, the 1370903S replacement part ensures the burner circuit opens if internal plenum temperatures exceed safe operational parameters. Replacing a faulty or weakened OEM limit control with this genuine factory component maintains the integrity of the original equipment's furnace safety circuit and prevents unauthorized cycling or lockout conditions common in residential forced-air systems.

Key Benefits for Technicians

• Genuine OEM Specification: Ensures exact electrical ratings and thermal response curves for Goodman furnace repair.
• Precise Thermal Calibration: Features a factory-set 240-degree Fahrenheit thermal cutout to protect the heat exchanger from damage.
• Direct Fit Compatibility: The 3" probe depth allows for proper airflow sampling within the furnace cabinet.
• Critical Safety Compliance: Restores the high-limit safety loop to manufacturer standards, ensuring reliable 24V signal interruption.

Common Installation Questions

What causes a 240F limit switch to trip repeatedly?
Repeated tripping typically indicates restricted airflow due to a dirty filter, undersized ductwork, a failing blower motor, or a compromised heat exchanger. Always check static pressure when installing a replacement limit switch.

Is this switch compatible with Janitrol-branded equipment?
Yes, as an Amana-Goodman 1370903S component, it is the direct replacement for many older Janitrol and newer Amana/Goodman furnace models utilizing a 3-inch insertion depth.

Can I use a higher temperature limit switch if this one keeps tripping?
No. Technicians must always use the OEM specified cutout temperature. Installing a switch with a higher rating than the 240F specification can lead to equipment failure or hazardous operating conditions.

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.