An evaporator coil of a single evaporator, air-cooled refrigerator is accumulating excessive frost due to a failure of the defrost mechanism. If the refrigerator features a thermostatically controlled box solenoid and a low-pressure cutout controlled compressor, as well as a high-pressure cutout, in terms of the compressor, what would be the most likely operating symptom?

Correct Answer: Option B — short cycle on low-pressure cutout

Severe evaporator frosting restricts airflow, reducing heat transfer and lowering suction pressure below the low-pressure cutout setpoint. The compressor stops, frost melts slightly, pressure rises, and the unit restarts, creating rapid short cycling on the low-pressure cutout until the defrost failure is corrected.