Amana-Goodman B1370190 Limit Switch

The Amana-Goodman B1370190 Primary Limit Switch is a critical OEM replacement part engineered for precise thermal regulation within residential and commercial HVAC furnace systems. Specifically designed as an L210-30F limit switch, this safety component features a fixed cut-out temperature of 210F and a reset temperature of 180F. As a primary safety interface, it monitors the heat exchanger’s internal environment, effectively breaking the electrical circuit to the gas valve if temperatures exceed the safe 210-degree threshold to prevent equipment damage and ensure site safety.

Constructed for compatibility with a wide range of Amana, Goodman, and Daikin furnace models, including the GMS80, AMH80, and GMT series, this bimetal disc switch provides the high-reliability response required by veteran service technicians. Using genuine Amana-Goodman furnace parts maintains the original equipment’s integrity and operational specifications. This 210F primary limit is an auto-reset style control, meaning it will restore the circuit once the plenum temperature cools back to the 180F differential, allowing for the restoration of the heating cycle after the fault condition is cleared.

Key Benefits

• Optimized Furnace Safety: Precise 210-degree Fahrenheit trip point ensures rapid shutdown during over-temperature events.
• Broad Compatibility: Drop-in replacement for common Goodman furnace limit switch applications across multiple product lines.
• Auto-Reset Functionality: Closes the circuit automatically at 180F, reducing nuisance lockouts after the system cools.
• Genuine OEM Component: Specifically manufactured to Amana-Goodman engineering standards for long-term thermal cycling durability.

Common Questions

What causes a primary limit switch like the B1370190 to trip?
In most HVAC systems, this switch trips due to restricted airflow. Technicians should inspect for dirty filters, blocked return air ducts, or a failing blower motor that prevents adequate heat dissipation from the heat exchanger.

Is the B1370190 a universal limit switch?
No, this is a specific OEM part with a fixed 210F setting. Replacing it with a switch that has a different temperature rating can lead to premature failure or unsafe operating conditions.

How do I verify if my furnace needs this specific 210F limit?
Check the markings on your existing switch or cross-reference your furnace model number. This part is frequently used in 80% AFUE gas furnaces where a 210-degree safety threshold is specified by the manufacturer.

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.