Question 164Refrigeration & AC - 1st Asst/Chief

The correct answer is D) Replace the switch as there is generally no adjustments available on the switch. This is the correct answer because the lube oil pressure differential switch is typically a simple on/off switch that is designed to protect the refrigeration system. There are generally no user-adjustable settings on this type of switch. If the switch is suspected to be malfunctioning and causing intermittent failures, the recommended course of action is to replace the switch rather than attempt to adjust it, as any adjustments could further damage the system. The other options are incorrect because A) decreasing the time delay setting, B) increasing the switch setting, and C) lowering the switch setting, would not be appropriate actions for troubleshooting a suspected issue with the lube oil pressure differential switch, as this switch typically does not have any user-adjustable settings.