So my Aircon works fine - blows nice and cold... But not straight away. If you turn it on when the car is started, it doesn't do anything.

Drive for a few minutes and have another go, and it works great. What can cause that?

I do have another odd Aircon issues actually, when driving at a fairly quick pace (say 40mph plus?) and slow down for traffic lights etc, it blows warm air for a second or two then back to cold again.

Possibly related?

Not sure on the start up thing but on the blowing warm we had a similar issue with our mk 2. Have you tried resetting the diverter flaps? I can't quite remember how but I think it's press and hold the econ button and the face vent buttons at the same time for a couple of seconds

Edited 21 June, 202521 Jun by skomaz