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Which outcome occurs when an HVAC evaporator's airflow is severely restricted?

A)Refrigerant floods back to compressor
B)Compressor oil overheating and breakdown
C)Significant increase in evaporator superheat
D)Expansion valve restricts refrigerant flow

💡 Explanation

When evaporator airflow is restricted, reduced heat transfer causes lower refrigerant vaporization because less heat is absorbed. Therefore, liquid refrigerant floods back through suction lines, rather than valve restriction, higher superheat, or oil overheating, which require different causes.

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