I have a 2006 407 wagon with the 2.7L HDi twin turbo engine. It has been into a Peugeot Dealer (Pacific Euro) with the following problem:
When first powered up if the cabin is cool or moderately warm the air conditioner blows cool/cold air right away. However if the cabin is warmer to hot when powered up the air conditioner blows warm air for a variable amount of time (typically between 3 to 5 mins). After this period the pitch of the fan changes slightly and it starts to blow cold air. The dealer has had their A/C tech look at it and he has said everything is normal (i.e. pressures ok and Planet readouts all nominal). I thought maybe a flap motor was bad or sticking but they say everything tests ok. So either the dealer doesn't know anything about the A/C which I doubt, I am too fussy about the 407s ability to cool but it has worked well in the past or there is something obscure wrong with the system. So for all you knowledgeable Peugeot people anyone have any ideas as to what this could be?