The Carrier HH19ZA201 Limit Switch is a critical safety component designed for HVAC furnace temperature regulation. This OEM Carrier replacement part functions as a normally closed SPST disc limit switch, engineered to interrupt the heating circuit when the plenum temperature exceeds safe operating parameters. With a calibrated opening temperature of 200°F and an automatic reset temperature of 130°F, it ensures high-limit protection for Carrier, Bryant, and Payne furnaces. This auto limit switch utilizes a precise bimetallic disc sensor to maintain system integrity, preventing heat exchanger damage due to restricted airflow or mechanical failure. As a veteran-grade furnace high limit switch, the HH19ZA201 provides consistent thermal response and long-term durability in high-cycle residential and light commercial applications. Replacing a faulty temperature actuated switch with this genuine HH19ZA201 Carrier part restores secondary safety cut-out functionality, essential for meeting manufacturer specifications and maintaining peak appliance safety.

• Precise Thermal Calibration: Features a fixed 200°F open and 130°F close range for accurate furnace safety limit control.
• Automatic Reset Functionality: Eliminates the need for manual intervention once temperatures return to 130°F, reducing HVAC system downtime.
• OEM Compatibility: Direct replacement for Carrier HH19ZA201, ensuring a perfect fit and electrical alignment with factory wiring harnesses.
• Enhanced Safety: Acting as a primary high limit cut-out, it prevents dangerous overheating conditions and protects the heat exchanger.

What causes a Carrier HH19ZA201 limit switch to trip?
A trip is typically caused by restricted airflow, such as a clogged furnace filter, a failing blower motor, or obstructed return air vents, causing temperatures to hit the 200°F threshold.

Is the HH19ZA201 an automatic or manual reset switch?
This is an automatic reset limit switch. It will re-close the circuit once the sensed temperature drops back down to 130°F.

Can I use this switch in non-Carrier brands?
While designed for Carrier, Bryant, and Payne equipment, it can be used in other systems if the technical specifications, mounting footprint, and temperature ratings match exactly.

Item is Non Cancelable / Non Returnable

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.