A walk-in freezer has the following conditions. Which remedy below would most likely solve the problem?

? Box temperature is up to +10°.
? the evaporator temperature is -10°, LOW
? the line leaving the evaporator is +12°, High Superheat 22° of superheat
? the ambient air temperature at the condenser is 75°,
? the condensing temperature is 100°, NORMAL (25° condenser split is OK for freezers)
? and the liquid line is 92°. NORMAL (8° subcooling)
a. Add refrigerant b. clean condenser c. clean the evaporator d. adjust the TEV


d. adjust the TEV

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