Service rep came by during our last service and advised us that our regulator? was gradually degrading and we need to have it replaced as there were no parts to repair it. He was supposed to get back to us about this ( replacement, prices, etc ) but we never heard back from him.
I like paying yearly and we have not had any problems up to this point. We are gone all summer so we probably will not need salt, but I guess the service man will see that and do what if anything is necessary.