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Found that duct work at air handler on the the return side is not very good for air flow. Found entire coil sweating except upper left hand side where the air flow does not transfer across very well. Found r410a refrigerant pressures to be 329/148 at 89 degrees. Pressures are pre well on. Only found 14 degree split at indoor unit, but system was keeping 72 degrees inside. He did have refrigerant added within a few weeks ago though explained to him that if the leak is is in the evaporator coil, it could be a $3,000 to $4,000 repair. Recommend he replace the system. He is going to wait at this point until the system stops cooling again.