Question 43Refrigeration & AC - QMED

The correct answer is B) the suction line will be abnormally cold and liquid may flood back to the compressor. When the superheat setting of a thermostatic expansion valve is set too low, it causes the valve to open wider, allowing more liquid refrigerant to flow into the evaporator. This can lead to a reduction in superheat, causing the suction line to become abnormally cold and liquid refrigerant to potentially flood back to the compressor. This can damage the compressor and negatively impact the system's performance. The other options are incorrect because: A) a reduced amount of refrigerant returning to the compressor would cause the suction line to be abnormally warm, not cold; C) a reduced amount of refrigerant returning to the compressor would cause the receiver level to be abnormally low, not high; and D) the box temperature would be too low, not "way down below the normal temperature range."