Which outcome occurs when a heat pump's outside coil temperature drops significantly below freezing in high humidity?

A)Liquid refrigerant floodback to compressor

B)Reduced heat transfer due to frost buildup✓

C)Increased energy efficiency from supercooling

D)Refrigerant pressure increase causing compressor stall

💡 Explanation

When the outdoor coil temperature drops and humidity is high, frost formation occurs because moisture freezes on the cold surface, acting as an insulator and reducing heat transfer. Therefore, reduced heat transfer results, rather than floodback, supercooling, or stall, each of which requires different operational faults.

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Which outcome occurs when a heat pump's outside coil temperature drops significantly below freezing in high humidity?

💡 Explanation

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