ClimateMaster 33B0002N07 TXV 320074-702 Always use a clean cloth

Always use a clean cloth or gloves and wipe the bulb with an alcohol swab before sliding it into the UV-Aire purification system

Direct OEM Compatibility: Verified as an identical replacement for 89M9301 and 100335-28

The Trane BRD4785 (also identified as the UC210 Printed Circuit Board) is a critical OEM replacement component designed for high-level communication and control within Trane HVAC systems

Industry Compliance: Engineered to meet standard boiler feed valve requirements for residential and commercial heating

it provides the exact fit required to prevent flue gas leakage or false air intake

ClimateMaster 33B0002N07 TXV 320074-702 Always use a clean clothThe ClimateMaster 33B0002N07 TXV is a critical 1 2" x 1 2" thermostatic expansion valve designed specifically for high efficiency water source heat pumps and geothermal systems. As a veteran technician knows, maintaining precise refrigerant flow control is essential for protecting the compressor and ensuring the evaporator coil operates at peak thermal efficiency. This OEM ClimateMaster expansion valve utilizes a dual port balanced design with an