Re: [VAC] refurbishing 1976 AS 31'

["Philip Piper" <pmpiper@xxxxxxxxxxx>]

Don, there is another reason for an AC unit not to cool well. I haven't seen 
it mentioned here so I will. If there is too much freon in the unit the 
freon can't expand when it goes past the expansion valve. I have seen this 
on central units where the "service man" just had no clue what he was doing.
Check your unit for after market service valves on the lines, if there are 
valves added this just could be the problem. This problem can be identified 
using pressure readings and thermometers on the freon lines, but someone has 
to know what they are doing to interpret the readings this is not magic but 
there is a standard temperature-pressure readings published in service 
books.

Phil Piper