a4 ac question

[Mark R]

All systems from any manufacturer work this way, give or take.  Yours is
normal.  Even though the symbol comes on with defrost, if it's 20 degrees F
outside, the A/C will never actually come on.  The symbol doesn't indicate
compressor on or off, it indicates that if the computer deems it safe AND
necessary, the compressor will kick on.  If it's neither safe (too cold, too
little system pressure, too much system pressure) nor necessary (temp cold
enough, moisture level low enough).  Again, the symbol has no correlation to
the actual compressor binary state.

The snowflake is the same as "auto" on older A/C control heads.  The
snowflake off is the same as "econ."

Mark Rosenkrantz


On 4/18/07, thejimrose <thejimrose at gmail.com> wrote:
>
> all - quick ac question. my ac won't come on when it's around freezing
> outside.  if i select defrost the ac will come on automatically, likewise
> if
> i manually turn it on it works fine, except when in tahoe - high and cold.
> it will work fine once it warms up a bit - usually i'm down the hill and
> the
> temps warm up.
>
> when i click the ac button the ac symbol will come on but for only as long
> as i hold the button. is this some weird feature or is my ac compressor
> freezing or sticking in the cold?
>
> the first time there was a lot of snow out, so i assumed snow froze it.
> this
> last time there was no snow on the ground and temps were around 32.
>
> thanks
> jim
>
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