Only system , 3 zones, not cooling. System is low on Freon and found a leak in the evaporator coil (possible other leaks). System is 10 years old (heat pump)and it’s out of warranty. Gave price to replace evaporator coil, but, at this age and conditions, best option would be to upgrade the system, and bring comfort, warranty and efficiency back to the house. Also, compressor is making very loud noise and possible compromise.