Found some of the common troubles today. #1 if any part of the system frosts over like this reciever dryer, then it is plugged, #2 Crap on your heater core or evaporater core cuts airflow drastically. When the temp warms up my drivers believe the AC is the most important system on the truck. :beatsme
Nice tips! I didn't know about the frost on something means its clogged. It makes perfect good sense! You definitely know when its getting warm if you own a fleet of equipment/trucks cause you will hear all kinds of complaining.