Carrier HH19ZH215 Limit Switch

As an HVAC professional, you know that a failed Carrier HH19ZH215 limit switch is often the culprit behind frequent furnace cycling or a complete system lockout. This critical 210F CO auto limit switch is a Genuine OEM replacement part designed for high-temperature safety across various Carrier, Bryant, and Payne heating platforms. When the unit’s internal plenum temperature reaches the 210°F threshold, this limit switch/thermostat opens the circuit to the gas valve, preventing heat exchanger damage. Utilizing a normally closed (NC) configuration with an automatic reset function, the HH19ZH215 restores operation once safe temperatures are achieved.

Replacing a compromised fixed-mount limit control with a factory-authorized component ensures your equipment maintains its original safety listing and airflow monitoring precision. This switch is calibrated for HVAC high-limit protection in gas-fired furnaces, air handlers, and PTAC units. For technicians performing HVAC troubleshooting, the Carrier HH19ZH215 provides the reliable thermal response needed to protect residential and commercial heat exchangers from overheating conditions.

• Factory Calibrated: Precisely set to open at 210°F to ensure immediate furnace safety shutdown during overheating.
• Automatic Reset: Features a CO Auto design that simplifies system recovery once the plenum cools, reducing unnecessary service calls.
• OEM Compatibility: Designed specifically for Carrier, Bryant, and Payne equipment to ensure any high-limit switch replacement matches original specifications.
• Durable Construction: Built to withstand the high-cycle demands of modern residential heating systems and commercial air handlers.

Is the Carrier HH19ZH215 a manual or automatic reset?
This is an automatic reset limit switch (CO Auto). It will automatically close the circuit once the ambient temperature at the sensor drops below its reset differential.

What causes this limit switch to trip frequently?
Frequent tripping is usually a symptom of restricted airflow, often caused by a dirty air filter, blocked return vents, or a failing blower motor. Always check these components when replacing a limit switch.

Can I use this HH19ZH215 in a Bryant furnace?
Yes. Because Carrier, Bryant, and Payne share many internal components, the HH19ZH215 is the correct genuine OEM part for various furnaces across those brands. Always verify the part number against the unit's schematic.

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.