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The HD52AZ465 is the current production model and a direct drop-in replacement for the obsolete HD52AR465
How do I know when this 15 micron filter needs replacement
Ensure your existing valve stem hardware is intact or order a replacement clip set if the original is corroded
Designed for Lennox furnace maintenance
Nordyne 669578R TXV 320734-701 The HD52AZ465 is the currentThe Nordyne 669578R is a high performance 5 Ton R410A TXV designed to provide precise refrigerant metering for residential and light commercial air conditioning systems. Engineered for N Series evaporator coils, this TR6 Thermal Expansion Valve maintains optimal superheat across varying load conditions, preventing compressor liquid slugging while maximizing evaporator coil efficiency. As an OEM Nordyne replacement part, it ensures seamless
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