In an R-134a system, pressure and performance testing are the only ways to identify low refrigerant levels.

Name: In an R-134a system, pressure and performance testing are the only ways to identify low refrigerant levels.
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Quizplus · Accepted Answer

Visual inspections for leaks, checking for ice buildup, and monitoring temperature differences across the evaporator and condenser can also indicate low refrigerant levels, in addition to pressure and performance testing.

In an R-134a System, Pressure and Performance Testing Are the Only