Nordyne 664350 TXV Valve 320720-756 perfect for modern heat pump

perfect for modern heat pump applications

this valve facilitates tiered heating—low-fire and high-fire stages—to optimize combustion efficiency and temperature stability

Common signs include a buzzing sound from the compressor

it features a 5-second Trial for Ignition (TFI) and a 5-second ignitor heat-up period to ensure stable combustion

This thermostatic expansion valve kit features a balanced port

Nordyne 664350 TXV Valve 320720-756 perfect for modern heat pumpThe Nordyne 664350 is a high performance 4 ton R410A thermostatic expansion valve engineered for precise refrigerant metering in residential and light commercial split system evaporators. This genuine OEM component is designed to maintain target superheat across varying load conditions, protecting the compressor from liquid slugging while maximizing heat transfer efficiency. As a direct replacement for Nordyne 664350R, it features a balanced port