Service call for no a/c in the home there is only one zone for the 2nd and 3rd floor equipment is a unico air handler located on the 3rd fl knee wall with a Lennox outdoor condenser. System is struggling to cool and blowing warm air. Inspected air handler blower was on and running, customer had just recently replaced air filter size 14x20 drain was clear no issues up at air handler. Found the system low on refrigerant indicating there is a refrigerant leak some where in the system. Explained to customer about refrigerant leaks and options were given to recharge and dye or just recharge the system. Customer agreed to do both recharge and add dye to the system. System was recharged with 2lbs 8oz system is cooling properly will need to return to search for dye in about 60-90 days. Supply temperature is around 50 degrees https://visionshare.xoi.io/?id=ms3d8fa494-575d-i184-702e4a44b995-uF83-6faa6d0dde2b