Thanks for all the great comments and advice. I did get a hold of an American Standard Rep. He knows the installer. He is going to get with him to get all the info on the repair work. He was telling me that they have had similar problem in Seguin TX because of sulfure. Most of south Texas has sulfer in the water. The curious thing here would be there are 4 houses here, all have central air units. The other 3 are less than 3 years old, and none have ever had any problems at all. They too are all American Standard units, the only difference is they all use the R-22 refrigerant. Mine the one with all the leaks uses the R-410a. I will update as soon as hear from the rep.