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← TechnologyWhich outcome occurs when thermal expansion valve fails, restricting flow to HVAC evaporator?
A)Compressor overheating due to high discharge pressure
B)Reduced cooling capacity due to incomplete evaporation✓
C)Refrigerant flooding to the compressor suction line
D)Excessive frosting on the evaporator coil surface
💡 Explanation
When thermal expansion valve restricts the flow, the evaporator becomes starved of refrigerant; incomplete evaporation results because insufficient liquid is present to absorb the heat load. Therefore cooling capacity is reduced, rather than overpressure discharge, compressor flooding, or frosting which require different imbalances.
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