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The Bard 905-0352 TXV Assembly is an OEM thermostatic expansion valve assembly used in Bard wall mounted packaged air conditioners to meter refrigerant into the evaporator and maintain stable superheat across changing load conditions. A properly functioning TXV helps protect the compressor and supports consistent capacity, especially when symptoms like hunting, frosting, or poor cooling point to improper refrigerant feed. Because TXV assemblies are application specific by unit model, refrigerant, and capacity, confirm the exact Bard model and serial number before ordering to ensure correct fit and operation.