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← ScienceWhich risk sharply increases when a refrigeration cycle's expansion valve fails wide-open?
A)Compressor motor winding insulation failure✓
B)Refrigerant over-compression and decomposition
C)Evaporator coil icing and blockage
D)Condenser fan motor draws excess wattage
💡 Explanation
Failure causes unrestricted flow, leading to flooded refrigerant returning to the compressor. Liquid refrigerant compresses poorly because volume dramatically drops; therefore, extreme pressure damages the motor's windings, rather than refrigerant decomposition, due to incorrect compression.
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