nunodaluz

Hello i am from Portugal and i have a brand new Fiat Freemont, 2013, i am very happy with the car, but something is bothering me, when i turn the A/c a strange noise comes from the conducts, when i turn off the A/C only forced air it goes off, it seems metalic, when to the workshop and they dont know what it is anyone here with a similar problem? Thank in advance. Must say a VW user all my life, i am very happy with the car...