For high-performance hydronic heating systems

Ruggedly constructed for industrial environments

03 lb design allows for easy integration into tight electrical control boxes and terminal strips

Designed for versatile field integration

Carrier HH79NZ001 Thermistor 321894-709 For high-performance hydronic heating systemsThe Carrier HH79NZ001 Thermistor is a critical OEM replacement part designed specifically for Carrier and Bryant PTAC (Packaged Terminal Air Conditioner) units. As an indoor frost sensor thermistor, this probe monitors the evaporator coil temperature to prevent freeze ups that can lead to compressor slugging or reduced cooling efficiency. By providing precise resistance feedback to the control board, it ensures the system initiates defrost cycles or