I was called to a condo in the city to check on an HVACI system that was not cooling. Upon arrival, I found that the system was running correctly and that the cooling was adequate. However, I noticed that the sub-cooling was low. I checked the refrigerant levels and found that the system was low on 410. I added more refrigerant to the system and performed a leak test to ensure that there were no leaks. After completing the repairs, the system was cooling properly and the sub-cooling was back to normal. The customer was happy with the service and thanked me for my help.
