Carrier 38BQ660007 Thermostatic Expansion Valve

Carrier 38BQ660007 Thermostatic Expansion Valve is a TXV that meters refrigerant into the evaporator coil of Carrier HVAC equipment, using a temperature-sensing bulb and built‑in actuator to regulate flow and maintain stable superheat. The part is identified with associated numbers EA02HB390 and R0545, and is listed in Carrier's TXV family as 38BQ660007 across official catalogs and distributor listings. Some retailers and Carrier catalogs show this valve as obsolete, with notes that replacement options may be available from Carrier or authorized distributors. It functions as a metering device within the refrigeration cycle, controlling refrigerant flow to the evaporator based on evaporator temperature, helping maintain cooling performance and efficiency in applicable Carrier systems. When replacing, confirm compatibility with your Carrier unit's coil configuration, refrigerant, and service documentation to ensure correct head and connection type. Typical applications include Carrier air handlers, rooftop units, and packaged equipment that rely on TXV metering for precise refrigerant control.