Amana-Goodman B1370195 Limit Switch

The Amana-Goodman B1370195 Limit Switch is a critical safety component designed for high-limit temperature regulation in residential gas furnaces. Labeled as an L300-30F primary limit switch, this normally closed disc-style switch is engineered to open the electrical circuit when internal plenum temperatures reach 300°F, effectively shutting down the burners to prevent heat exchanger damage. Once the system cools by 30°F (resetting at 270°F), the automatic reset function restores the circuit for continued operation. As a genuine OEM replacement part, it ensures precise calibration and fits various Amana and Goodman gas furnace models, including the GDS8 and GMT series. Technicians should verify airflow restrictions, such as clogged filters or internal blockages, if the system is frequently tripping the limit switch. This HVAC high-limit sensor is a direct replacement for units requiring a 60T81 size configuration to maintain safe operating parameters and prevent system overheating.

• OEM Precision: Direct Amana-Goodman replacement part ensures exact thermal response and electrical compatibility.
• Safe Temperature Regulation: Features a fixed 300-degree opening point to protect the heat exchanger from thermal stress.
• Automatic Reset Logic: Eliminates manual intervention by resetting once the plenum temperature drops to 270°F.
• Broad Compatibility: Engineered for use in GDS80703, GDS80904, and GMT045 furnace models.

How do I know if the B1370195 limit switch is faulty?
If your furnace blower runs constantly while the burners shut off prematurely, or if the control board flashes a 4-light diagnostic code, the primary limit switch may be open. A technician should check for continuity across the terminals when the switch is cool; a reading of infinite resistance indicates a failed component.

What causes a primary limit switch to trip repeatedly?
While the switch itself can wear out, frequent tripping is usually a symptom of insufficient airflow. Check for a dirty air filter, obstructed return ducts, or a failing blower motor capacitor, as these issues cause heat to build up beyond the 300°F threshold.

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.