Re: E39 stinky a/c ...

"daytripper" <day_trippr@xxxxxxxxxxxxxxx> wrote
"Floyd Rogers" <fbloogyuds@xxxxxxxxxxx> wrote:
...It seems that BMW programmed the a/c system to always
select re-circulation mode until the interior air is at the desired temp.
This really retains humidity in the cabin and ventilation system.

I think you might have that last part backwards. Recirculation really
reduce the cabin humidity quicker than that obtained when pulling in
air, in which case the expansion coil would also more likely be drier in
recirc mode than fresh-air mode.

If the drain is plugged, all the moisture stays in the cabin/system.
If it's not plugged, you're correct.