Service Call Fee: Arrived to find system completely out of R-410A refrigerant. Talked to customer about some options. Customer opted to fill system back up for time being. Notified that it would most likely leak refrigerant off very quickly being the system had zero in it. Churched system back up to factory specs and tested operation with 17° temp drop. Leak is most likely in the evap coil but would need to perform a leak search to verify. All checks good
