While a technician is performing an A/C system performance test,it is determined that the low pressure gauge is reading in the vacuum range.This reading could be caused by:

Question

Quizplus · Accepted Answer

A restricted expansion valve can cause the low pressure gauge to read in the vacuum range because it limits the flow of refrigerant into the evaporator, leading to lower pressure on the low side of the system.

While a Technician Is Performing an A/C System Performance Test,it