our a/c quit working again after paying a small fortune to have it replaced at the end of July. now we find out today that the tubing or whatever that was already in the house is not copper, and they installed the new a/c with copper, so couldn't weld had to use connectors. Well the connectors are leaking coolant. He said they can replace the connectors and put new coolant in for $2600 that might last 2 years, or replace the existing piping with copper and weld them for a permanent fix for $4500 and it would still be under warranty for the rest of 10 years since it was installed. we are beyond ticked off needless to say. these people apparently think we have a money tree growing in our yard. Ugh.