I arrived at our clients home for the unit not cooling properly. Mrs Johnson explained that the unit stopped cooling Saturday and Sunday she felt like it was not cooling at all. I proceeded outside and began to search for any signs of a refrigerant leaks. I did find a small bubble present at the connection of one of the flare fittings. It was an intermittent bubble that was not consistent or very strong. I shared this with Mrs Johnson and let her know I would do my best to tighten the fitting. I also shared that if I was unable to correct the issue today we would call the install team to cut and create a new flare to be connected. I tightened the flare connection and pulled a vacuum down to 324 microns. I let it sit for 20 mins before weighing in the manufacture charge of 3lbs 9oz. I also changed the valve core as a proactive measure to ensure everything was tight and sealed. I let the run for more than 30 mins and bubble tested the fittings and used my leak detector and found no le