Amana-Goodman B1370189 Limit Switch

The Amana-Goodman B1370189 Limit Switch is a critical safety component designed for specific residential gas furnaces and heat pump systems. This 170-200F auto limit switch functions as a high-limit safety control, monitoring the heat exchanger temperature to prevent overheating. When temperatures exceed the 200°F threshold, the switch opens the circuit to the gas valve, shutting down combustion until the plenum cools to 170°F, at which point it automatically resets. This OEM Goodman furnace part is a direct replacement for various Amana HVAC limit switches, ensuring precise thermal response and mounting compatibility. Technicians should verify the temperature range and footprint against the existing faulty switch to ensure proper cycle rates and system protection. Integrating this genuine B1370189 switch maintains the UL listing and operational integrity of the furnace, providing reliable over-temperature protection in high-static or restricted airflow conditions.

• Precise Thermal Calibration: Calibrated for 170°F-200°F range to ensure rapid response to overheating.
• Automatic Reset Function: Eliminates the need for manual intervention once temperatures return to safe operating levels.
• OEM Compatibility: Precision-fit for Amana, Goodman, and Janitrol air handlers and gas furnaces.
• Industrial-Grade Construction: Built to withstand high-cycle environments and fluctuating plenum temperatures.

Is the B1370189 a universal limit switch?

No, this is a specific Goodman OEM replacement part. While it physically resembles other switches, the 170-200°F temperature profile is specific to certain furnace BTU ratings and blower configurations.

My switch is tripping frequently; is the part defective?

Frequent tripping usually indicates an underlying airflow issue, such as a clogged filter, dirty evaporator coil, or undersized ductwork, rather than a faulty furnace high limit switch.

Can I use a switch with a different temperature rating?

No. Using a switch with a higher limit can lead to heat exchanger damage or hazardous operating conditions. Always match the OEM temperature specifications.

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.