The r62 is not a high flow system, but will cool. As stated if you pull down the system you will find either an air leak in the ductwork, which can and should be sealed with silicone in the joints, or your evaporator and heater core is plugged. We have also seen fan assys installed reversed. We also remove the high speed wire from the fan motor and run it to an added relay with n10 wires to batt and use this wire as a trigger wire for the relay instead of power to the motor. Thus the motor gets full voltage and does not have the voltage drop due to compressor coil. Picks it up about 10+ % we guess. There are many outlets, if you want more volume on the noggin shut some off. A neat trick is to place a correct sized styrofoam box under the shotguners seat and cut a hole to allow the duct to blow into it - thus an onboard fridge for your non alcoholic beverages and the like - of course on the other hand,,,,,