While securing the air conditioning compressor you close the suction valve and the compressor stops after a short period of time. Subsequent attempts to start it produce no result. What control component would you suspect is preventing the compressor from starting?

Correct Answer: Option A — The low pressure cut out switch.

Closing the suction valve starves the compressor of refrigerant vapor, causing the suction pressure to rapidly drop below the low-pressure cutout setting, which automatically trips the switch and prevents the compressor from starting.