Nordyne 664350 TXV Valve 320720-756 it functions as a critical

it functions as a critical HVAC control component by translating electrical signals into mechanical positioning for zone dampers or combustion air intakes

offering enhanced desiccant properties to prevent internal corrosion and ice formation at the expansion valve

Key Benefits High-Flow Efficiency: Supports up to 1

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

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

Nordyne 664350 TXV Valve 320720-756 it functions as a criticalThe 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