this automatic reset limit switch provides essential circuit interruption to prevent heat exchanger damage or unsafe operating conditions

it is recommended to mount the valve with the solenoid coil in a vertical and upright position

please consult the technical data sheet to ensure compatibility with your specific media

Enhanced Airflow: The 54-blade configuration maximizes air pull

Carrier HH18HC065 Defrost Thermostat 320720-756 this automatic reset limit switchThe Carrier HH18HC065 Defrost Thermostat is a critical temperature actuated switch designed for Carrier, Bryant, and Payne heat pump systems. As a veteran grade OEM replacement part, this DPDT defrost thermostat ensures precise defrost cycle management by monitoring the outdoor coil temperature. It is engineered to open at 65F and close at 45F, preventing unnecessary heater activation and protecting the compressor from liquid slugging during cold