During an AC performance test, an R-134a air conditioning system has a measured center duct outlet temperature of 59 degrees F. A manifold gage set shows low side pressure ranges between 40-55 psi and the high side pressure ranges from 275-375 psi. Shop temperature is 72 degrees F. What is most likely the cause?
a. The TXV is restricted and not allowing sufficient refrigerant to flow
b. The system has a low refrierant charge
c. The compressor is defective
d. The system is overcharged
D. The system is overcharged
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