Amana-Goodman B1370191 Limit Switch

The Amana-Goodman B1370191 Limit Switch is a critical OEM replacement part engineered for precise thermal regulation within gas furnace air handlers. Operating as a safety-critical 190-220F auto limit switch, this component is designed to break the furnace circuit if the heat exchanger temperature reaches a 220-degree threshold, preventing furnace overheating and potential equipment damage. This genuine Goodman furnace limit switch features a compact design with high-conductivity terminals for reliable electrical continuity in high-vibration HVAC environments. Compatibility spans a wide range of Amana and Goodman residential heating units, ensuring a direct fit for field repairs. When diagnosing a furnace high limit switch tripping, replacing the sensor with this factory-tested HVAC high limit control restores system safety and prevents short-cycling issues caused by degraded bimetal sensors. Professional technicians prioritize this B1370191 thermal switch for its factory-calibrated set points and resistance to thermal fatigue.

• Critical Safety Protection: Monitors internal plenum temperatures to prevent heat exchanger damage.
• OEM Compatibility: Exact replacement for Amana-Goodman furnace parts, ensuring correct mounting and limit switch wiring.
• Auto-Reset Functionality: Automatically restores the circuit once temperatures drop below the 190°F reset point, minimizing nuisance service calls.
• Durable Construction: Engineered to withstand the high-temperature cycles of residential gas furnaces.

Common Service Questions

What causes a furnace limit switch to trip repeatedly?
Repeated tripping is often caused by restricted airflow. Check for a dirty air filter, blocked return air grilles, or a failing blower motor before replacing the B1370191 sensor.

How do I test the B1370191 limit switch?
Using a multimeter, check for continuity across the terminals when the switch is cold. If the switch remains open at room temperature, it has likely failed and requires replacement.

Is this switch compatible with other HVAC brands?
While primarily designed for Goodman and Amana equipment, it may fit other brands using identical temperature specifications and mounting footprints. Always verify the 190-220F rating before installation.

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.