The other day I did an oil change on my 406. The nice people who did my
clutch replaced some of the quick release fasteners for the undertray with
nuts and bolts. The end result was that the job took longer than I was
expecting, so when I needed to pick my gilfriend up from work, I went
without putting the undertrays back.

The air con went from being pretty good to absolutely freezing. Must be
getting a lot more airflow through the radiator and condensor.

Doki wrote:
The other day I did an oil change on my 406. The nice people who did
my clutch replaced some of the quick release fasteners for the
undertray with nuts and bolts. The end result was that the job took
longer than I was expecting, so when I needed to pick my gilfriend up
from work, I went without putting the undertrays back.

The air con went from being pretty good to absolutely freezing. Must
be getting a lot more airflow through the radiator and condensor.

or it has a leak, the first symptom of slightly low gas is that the
evaporator gets colder than it should, but hopefully it is just the better
cooling of the condenser.