Question 108Refrigeration & AC - 1st Asst/Chief

The correct answer is C) start and stop the compressor as needed. The low pressure cut-out switch is a safety device used in refrigeration systems to prevent damage to the compressor. It is designed to automatically shut off the compressor when the low-side pressure drops below a preset level, usually to protect the compressor from operating under a vacuum. This helps maintain the appropriate suction pressure and prevents the compressor from drawing in too little refrigerant, which could lead to mechanical failure. The other options, while related to refrigeration system operation, do not accurately describe the primary purpose of the low pressure cut-out switch.