Service call for issue with a/c that serves the main work out area of the gym. On arrival I spoke with Jackie and she had seen that the line set going out to the condenser was starting to freeze up so she had shut the system off. Air filter was very dirty this was replaced 20x20x1. System was turned on and all operations were checked. Found that the system is low on refrigerant causing it to freeze up. This is an indication that the system has a refrigerant leak. Explained to customer that there is a possibility of a leak and we would have to recharge the system up with refrigerant and add a dye to try and trace the leak. Once the dye is in the system we would have to return in 60-90 days to try and find where the system is leaking from. Unit could be leaking for either the indoor coil or outdoor coil or the line set. Jackie explained that I would have to email the owner to try and get approval. Nothing was done at this time and the system was left cooling off and fan on. https:/