Amana-Goodman B1370193 Limit Switch

The Amana-Goodman B1370193 Limit Switch is a critical OEM furnace safety component designed to monitor plenum temperatures and prevent heat exchanger fatigue. This fixed-temperature auto-reset limit switch features a L240-40F rating, meaning it initiates a burner cutout when internal temperatures reach 240 degrees Fahrenheit and resets once the temperature drops by 40 degrees. Engineered for high-temperature applications in Goodman and Amana gas furnaces, this bimetal thermal sensor prevents the blower motor from cycling indefinitely and protects against cracks in the heat exchanger assembly. When troubleshooting a furnace blower that won't shut off or a unit that is short cycling, replacing a failed factory limit is a standard preventative maintenance step to ensure system integrity. This genuine HVAC replacement part ensures exact electrical specifications and mounting footprints for a fast, reliable field installation.

• Precise Thermal Protection: Calibrated to trigger at 240°F to prevent hazardous overheating conditions.
• Automatic Reset Logic: Features a 40-degree differential, allowing the furnace limit control to cycle the system back on once safe operating temperatures are met.
• Direct OEM Fitment: Eliminates the need for field modifications, ensuring compatibility with Amana and Goodman air handlers and furnaces.
• Enhanced System Longevity: Protects the heat exchanger from thermal stress, reducing the risk of costly structural failures.

What are the signs of a failing furnace limit switch?
Common indicators include the indoor blower fan running continuously even when the thermostat is satisfied, or the furnace burners shutting off prematurely before the call for heat is met.

Is the B1370193 a manual or automatic reset switch?
This is an automatic reset limit switch, designed to close the circuit again once the temperature reaches the reset threshold, unlike manual reset switches which require a physical intervention.

Can I use a universal limit switch instead of this OEM part?
For critical safety components like a high-limit cutout, using a genuine Amana-Goodman replacement part is recommended to ensure the specific 240-degree trip point and response time match the original equipment design.

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.