A/C Issue?

[JPS48]

The A/C in my 2009 HB makes a very loud 'thud' and 'whir' when first engaged. By 'first engaged', I'm referring to the car running and the first time after starting it that I push the A/C dash button.

If I turn it off and then back on a few minutes later, there's still a noticable sound but nothing as abrupt, sudden or as loud as the initial one.

Mine is 9 months old with only 4000 miles so I'm hoping it might just be a break-in thing. The A/C certainly seems to produce, certainly it has during these past few days of 40C+ temperatures, although I've discovered that while driving with it on, the 6 speed transmission acts like a 12 speed, a trait many other manufacturers seem to have all but eliminated.

I'd certainly appreciate fellow owners experiences with this A/C characteristic, assuming it's commonplace.

[Promise Land]

I have an auto, but mine does the same thing. It's eite gotten a little better over time (I'm at 25k miles) or I've just gotten used to it.

[Backfire]

mine gives al oud thud as well. i have 15,000 on my 09 S. I was going to take it in sometime to see if they know whats up.