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Which undesired outcome results when ice accumulates unevenly across evaporator coils?

A)Reduced overall cooling efficiency
B)Increased refrigerant subcooling levels
C)Compressor oil starvation begins
D)Expansion valve remains over-opened

💡 Explanation

Reduced cooling arises because ice buildup causes thermal insulation via the **frosting** mechanism, directly reducing system's ability to absorb heat, thus reducing efficiency. Therefore, the system works harder to cool the same amount; rather than efficient heat transfer with even frost, concentrated ice acts as an insulator.

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