On a properly charged R-134a system an A/C performance test indicates both normal high- and low-side pressures,but poor cooling.Which of the following is the most likely cause?

Question

Quizplus · Accepted Answer

Restricted air flow through the evaporator is the most likely cause of poor cooling even when the high- and low-side pressures are normal. This could happen due to a clogged or dirty evaporator core or an issue with the blower motor. If the air can't pass through the evaporator efficiently, it won't remove the heat from the cabin, which would decrease the cooling performance. Restricted air flow through the condenser could cause high pressure on the high side and low cooling performance, while a faulty compressor or moisture contamination might affect both the high and low sides.

On a Properly Charged R-134a System an A/C Performance Test