If a refrigeration compressor had developed a slightly high suction pressure accompanied with an abnormally low suction temperature, the problem could be a result of which of the following?

Correct Answer: Option C — liquid refrigerant flooding back from the cooling coil

Liquid refrigerant flooding back from the cooling coil lowers the suction line temperature and increases density. The expanding liquid flashes across the suction manifold, resulting in higher suction pressure paired with an abnormally cold suction line.