[Q786]

Hi when I have my air con on it makes an blow noise. It starts soft and the rises loud like a (swish wind noise) then goes low. Any ideas what this could be ?

I bought the car in Jan. it had no gas and the filled it. Said no leaks.

 

[BIRDMAN]

Is this sound from the car vents or the aircon pump on the engine. If the vents it will be sensor fault.