Carrier HH18HC065 Defrost Thermostat 322056-301 This activated carbon filter element

This activated carbon filter element is specifically engineered for high-efficiency oil removal

Key Benefits for Contractors Universal Compatibility: Direct cross-reference for the 3ARR3-MARS551

When replacing legacy actuators

This SPST (Single Pole Single Throw) switch features a robust brass compression connection and is engineered to protect the heat exchanger by ensuring the burner only fires when adequate water pressure is detected

3-inch frame diameter and shaft dimensions against the existing assembly

Carrier HH18HC065 Defrost Thermostat 322056-301 This activated carbon filter elementThe 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