Air conditioning tune-up and safety inspection. Cleaned and serviced the condensing unit. After the diagnosis, I found that refrigerant levels were lower than the acceptable range. Found Schrader core on the liquid line to be faulty, causing refrigerant to leak out of the system. Replaced. Also found the capacitor extremely low and replaced. Added 2lbs of r410 refrigerant. Tested all other mechanical components. Tested compressor amperage and fan motor amperage. Everything else is in an accurate work condition. The system is now clean, cooling, and operating properly at this time.