John,

You may be able to get an opinion from Marvin Hillard at site
www.freeze12.com, in San Diego, toll free 888-903-7111  On that F12 site
there is a link for the text for the EPA-approved certification test for
AC technicians, via the site of the trade association of auto air
conditioning folks in Fort Worth, TX.  Couldn't hurt to be certified for
$20.00.

Tom Hanlon
Palm Springs, CA
84 Westfalia

John Lauterbach wrote:
>
> This is for an '84.  Air temp (measured by thermometer in outlet above
> driver's right eye) is running about 28 Fahrenheit degrees below outside
> temperature.  Is this about normal?  When I leave for work in the morning,
> outside temp is around 75F and outlet temp is in high 40s.  When I leave
> work, outside temp is near 100.  After driving about 10 miles, outlet
> temperature is in high 60s.  New A/C compressor, drier, and expansion valve.
> Refrigerant load is four (4) twelve (12) ounce cans.
>
> John Lauterbach
> Macon, GA