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If the cooling unit expansion valve is freezing what is responsible? ‎

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Answer added by  Ismael Hamad, Trainer, ANTONOIL DMCC , Lukoil project, WQ2
8 years ago

  THE CAUSE MAY BE: 1. Moisture - Water or a mixture of water and oil frozen in the valve port or working parts of the valve will prevent proper operation.  2. Dirt or fo ... See More

 

Answer added by  Menandro Cabanacan, Service Technician, TRANE
9 years ago

Be specific. What kind of expansion valve you're asking. Electronic or Thermostatic? Because in some instances the one controlling the operation of expansion valve h ... See More

 

Answer added by  Mohamed Salah El Mokadem, Customer Service Engineer, Weir Oil & Gas
9 years ago

1. Low Refrigerant Charge: A system that is low on refrigerant will have ice or frost on the valve. Check the sight glass. Also listen for a hissing noise coming from the ... See More