Upon arrival, I inspected the system and found that the supply was getting a temperature of 58 degrees. The static pressure was .3 inches of water column, and the return static pressure was .3 inches of water column. I also noticed that the customer had a 18x24 filter grill installed. Since I was not able to access the attic, I could not check the pressures in the system. I added refrigerant to the system and waited for 20 minutes to see if the system would cool down. However, the system continued to call for subcooling and superheating. I checked the pressures again and found that the system was still not cooling down. I added more refrigerant to the system and waited for another 20 minutes. The system continued to call for subcooling and superheating. I checked the pressures again and found that the system was still not cooling down. I decided to call the customer and explain the situation. I suggested that we check the refrigerant charge and see if there was a leak in the system. Th
