The 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

featuring a fixed regulator set at 9

the 9962-0306 offers advanced HVAC troubleshooting capabilities through enhanced LED diagnostics and fault code storage

which is critical for heat pump applications and complex piping circuits

including heat pumps and dual-fuel configurations

Lennox 58L66 Burner Assembly 322838-754 The Nordyne 664350 is aFor service technicians handling call backs on inconsistently igniting furnaces, the Lennox 58L66 Burner Assembly is the direct 2 burner OEM solution for restoring precise combustion performance. This genuine replacement burner assembly (catalog number 58L66, formerly LB 94731A or 50J52) is engineered for broad compatibility across Lennox furnaces as well as Allied, Armstrong, and Concord equipment. Unlike universal kits, this 2 burner furnace