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Which outcome leads to evaporator icing in humid environments?

A)Decreased refrigerant subcooling effectiveness
B)Increased compressor superheat regulation
C)Expansion valve thermal overload
D)Restricted airflow across evaporator coil

💡 Explanation

Ice forms on the evaporator due to moisture freezing during the phase transition within the evaporator. Because the airflow restrictions exacerbate this effect, the moisture freezes faster than it evaporates, therefore creating an accumulating icing condition, rather than a balanced thermodynamic cycle.

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