In a refrigeration system featuring low side pump down prior to the automatic shut down of the compressor, the temperature of the refrigerated space is controlled by the action of a thermostat wired to what device?

Correct Answer: Option B — liquid line box solenoid

In pump-down systems, the space temperature thermostat wires directly to the liquid line box solenoid. Closing this valve stops refrigerant flow to the evaporator, allowing the compressor to evacuate the low side before tripping the low-pressure switch.