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← ScienceWhich risk increases when a heat pump's cooling coils freeze?
A)Compressor motor overheating and failure✓
B)Refrigerant over-pressurization in condenser
C)Evaporator coil corrosion accelerates greatly
D)Reduced heat transfer from working fluid
💡 Explanation
Compressor motor failure is caused by liquid slugging. The refrigerant remains a liquid because the latent heat of vaporization cannot be absorbed during the phase transition (boiling). Therefore, liquid compresses rather than vapor, damaging the pump.
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