Amana-Goodman 1370908S Limit Switch

The Amana-Goodman 1370908S Limit Switch is a critical safety component engineered for precise thermal regulation in Goodman, Amana, and Janitrol diagnostic furnace systems. This heavy-duty L160-30F auto-reset switch features a 160°F cut-out temperature and a 30°F differential, ensuring the burner circuit opens immediately upon detecting an over-temperature condition from restricted airflow or blower failure. Designed for high-reliability applications, it serves as the direct OEM replacement part for legacy numbers B1370008, B1370908S, B13709-08, and the outdated 1370905. Utilizing a 7-inch insertion probe for accurate plenum temperature sensing, this HVAC high limit switch maintains the operational integrity of your heat exchanger. Whether you are servicing a residential gas furnace or a light commercial air handler, integrating this genuine Goodman replacement part guarantees factory-specified calibration and terminal compatibility for a seamless field installation.

• Universal Compatibility: Direct cross-reference for leading Goodman furnace limit switches, simplifying truck stock and reducing repeat service calls.
• Factory-Calibrated Precision: Features a fixed 160 degree cut-out to prevent heat exchanger fatigue and ensure occupant safety.
• Automatic Reset Logic: The L160-30F sensor automatically re-closes once temperatures drop below the 130°F threshold, eliminating manual intervention after momentary overheating.
• OEM Build Quality: Genuine Amana-Goodman 1370908S construction ensures the thermal disc responds accurately to rapid temperature fluctuations.

How do I troubleshoot a 4-flash error code on a Goodman furnace?
A 4-flash code typically indicates an open primary limit switch. Test the 1370908S for continuity across the terminals while the system is cool; no continuity confirms the switch has failed or is stuck open.

What causes this high limit switch to trip frequently?
Repeated tripping is usually caused by restricted airflow. Check for a clogged HVAC filter, blocked return air ducts, or a failing blower motor capacitor that prevents the fan from reaching the required RPMs.

Does the 1370908S replace the B13709-08?
Yes, the 1370908S is the current OEM replacement for B13709-08, B1370008, and 1370905, offering a standardized 3-leg or 2-wire mounting configuration depending on the specific model year.

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.