During my evaluation over the system today I found that the compressor has mechanically failed. When you turn the system on, there is a loud rattling noise inside of the compressor itself. I then checked out the rest of the system as much as I could. The system is clean at this time And all other parts seem to be doing OK. The system is very old and I do not recommend just replacing the compressor. I have turned the customer over to Adam who is our design consultant to give them the option of replacement of the entire system. I did offer the option for the compressor replacement itself , but due to the age, I am unable to guarantee that the replacement of the compressor will not be followed by more issues.