Condensers make fantastic bug and debris collectors, high pressures are common with R-134a with insufficient airflow. Seen some vehicles packed with debris between the condenser and radiator. Compressor also puts a heck of strain on these single drive belt systems, water pump takes the beating.
On these new compact cars designed to DOT standards, no longer have a removable shroud on top. Have to clean them from the bottom. Radiators have been bug collectors since day one. Can't condition air unless you have plenty of air movement. Another area is the evaporator, all the incoming air has to go through that, another debris and bug collector, finally added a cabin filter that can be replaced to keep the evaporator clean.
First chore in AC is to clean everything first, not an easy job on some vehicles.