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Common Questions Which thermostat models are compatible with this sensor
How does the "Normally Open" function work
Designed specifically for R404A and R507 refrigerants
The internal scale plate allows for simplified field calibration
You must supply a compatible 2-watt actuator for electronic control
Nordyne 669684R TXV 323080-701 Common Questions Which thermostat modelsAs a technician, you know that maintaining precise superheat is non negotiable for system longevity, and the Nordyne 669684R TXV is the specified OEM component for 4 ton R410A evaporator coils. This thermostatic expansion valve (TR6 series) is engineered to replace older Danfoss or Nortek models, providing the accurate refrigerant metering required to prevent liquid slugging and ensure optimal heat transfer across the A coil. Whether you are servicing