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← TechnologyWhich outcome occurs when moisture contaminates the evaporator in an R-134a refrigeration system?
A)Expansion valve blockage with ice formation✓
B)Excessive superheat due to oil breakdown
C)Compressor damage due to liquid slugging
D)Reduced subcooling due to refrigerant loss
💡 Explanation
When moisture enters an R-134a system, ice formation occurs at the expansion valve and evaporator because water freezes at a higher temperature than R-134a, causing a blockage and preventing proper refrigerant flow. Therefore, valve blockage results, rather than superheat, compressor damage or subcooling issues which are caused by different factors.
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