~~I meant to say that I think you have too large of a system installed now~~
The unit is undersized for the size of his house...
When you replaced your unit in 06, if the refrigerant type was changed from R-22 to R-410A, the line sets would have to be changed...
That’s right. I was going to service the old system at first but after I got an estimate, I just told them to replace everything with new.