ClimateMaster 33B0045N04 Expansion Valve

The ClimateMaster 33B0045N04 Expansion Valve is a critical metering device designed for precise refrigerant control within high-efficiency geothermal and water-source heat pump cycles. As a genuine OEM ClimateMaster replacement part, this thermal expansion valve (TXV) ensures the evaporator coil receives the exact mass flow of refrigerant required to maintain optimal superheat across varying load conditions. For a field technician, the 33B0045N04 is the go-to solution for resolving issues related to liquid slugging or evaporator starvation, which can lead to compressor failure or reduced heat transfer efficiency. Constructed with a focus on durability in demanding HVACR environments, this HVAC expansion valve features a compact design that facilitates straightforward installation in tight internal cabinets. By regulating the refrigerant flow control with high accuracy, this component helps stabilize system pressures and maximizes the Energy Efficiency Ratio (EER) of the supported ClimateMaster unit, ensuring reliable geothermal heat pump performance throughout the heating and cooling seasons.

• Ensures precise refrigerant metering to maintain target superheat and protect the compressor from liquid carryover.
• Direct ClimateMaster 33B0045N04 compatibility eliminates the need for field modifications or bracket adjustments.
• Optimized for water-source heat pump applications, providing stable operation under fluctuating entering water temperatures.
• Restores factory-standard cooling and heating capacity by preventing evaporator coil starvation.
• Engineered with robust materials to withstand the high-cycle demands of commercial and residential HVACR systems.

Is the 33B0045N04 compatible with R-410A systems?
Yes, this thermal expansion valve is specifically designed to handle the pressures and flow characteristics of R-410A refrigerant commonly used in ClimateMaster geothermal units.

How do I know if my existing expansion valve is failing?
Common indicators include inconsistent evaporator superheat, frost buildup on the indoor coil, or high discharge temperatures which suggest the valve is stuck or restricted.

Does this TXV include the sensing bulb and mounting hardware?
This part includes the integrated power assembly and sensing bulb required for standard installation into the refrigerant line.

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Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.