If a refrigeration compressor were short cycling on the low pressure cutout switch, what is the most probable cause?

Correct Answer: Option C — the expansion valve strainers were fouled

Fouled expansion valve strainers restrict refrigerant flow into the evaporator, causing a rapid pressure drop that prematurely trips the low-pressure cutout switch. Once the compressor stops, pressure equalizes and restarts the unit, creating short-cycling.