Came out to call for a mini split not cooling. Customer stated that the system was just blowing warm air. I checked the system and found the unit significantly low on refrigerant. Close to 50 psi initially, which is significantly low. I let customer know that he has a potential leak in the system and that I will need to do a pressure test on the system to find where the leak might be. Customer had his roof replaced a few months ago and it’s possible the roofers could’ve put a hole in the line, but I’m not for sure. Customer stated that we are doing his service in a couple weeks and asked if the leak search could be done at that time, and I said it could. I will come back out to do the leak search on the day that we perform the maintenance on the main system. Came back out to do leak search on system. Pulled remaining charge on system. Filled unit with nitrogen and performed a leak search. System held 205 psi during leak search and I wasn’t able to locate anything. So we ruled out nai