Freon does not get used up.  If you need to add more you have a leak.

            Eric                   86-VW4x4
            vw4x4@fyi.net          86-SS Syncro
            Pittsburgh, PA USA     1936-Chrysler
                                   92-Jetta GWC
            www.fyi.net/~vw4x4/vw4x4.htm

On Sun, 9 Feb 2003, developtrust wrote:

> Last time I charged my AC the freon lasted only 6 months. The service people
> said this was typical. Is this the experience of you all or is something
> wrong that needs fixing.
>
> It seems to me that a freon charged up system should last for years.
>
> William
>