Durable Construction: Built from robust

What causes a 2-wire thermopile to fail prematurely

easing the installation process for service technicians

the switch likely needs replacement

Carrier HH12ZA211 Limit Switch Refrigerant Durable Construction: Built from robustThe Carrier HH12ZA211 Limit Switch is a critical safety component designed for precise thermal regulation within residential furnaces and air handlers. This OEM Carrier replacement part functions as a primary high limit safety, monitors internal plenum temperatures, and prevents hazardous overheating conditions. Engineered with an auto reset mechanism, the switch is a Single Pole Single Throw (SPST) normally closed device that opens the electrical