Arrived in La Grange for AC Repair, Upon my arrival I evaluated two mini split systems and one furnace straight, cool split system. I verified system safety and performance is to manufacture specifications. Flushed and treated the water removal system. Cleaned the electrical cabinet and washed unit using water. Found that the furnace split straight cool system was low on refrigerant. I performed a leak check with my electronic leak detector and found multiple signs of refrigerant leaks at the indoor unit. My recommendation was for scheduling an appointment with the comfort advisor regarding potential repairs.