Air-con throbbing

[BigP]

Hey guys, what with the recent spell of warm weather I have been using the air-con. I noticed that when stationary I can feel a throbbing through the front seats, obviously something to do with the air-con as only when it's on. Does anyone else experience this and is it normal?
I have a 2005 2.2 direct SRI.
Thanks in advance for any help, and congratulations on such a top website.
Paul.

[Matt21385]

Mine does this aswell, I would say it is normal but someone will correct me if im wrong :D

[bandrew]

mine does it too 1.9 Cdti 150

[AndrewTi]

Mine never used to, spent a week with Vx, and now it does. I don't feel left out anymore!!

It's probably because it's working bluddy hard at the moment to give you some cool air, and probably shouldn't be a cause for too much concern.

[BigP]

Cheers guys, feel much betta now I know its not just me. :)

[Spikey©]

That'll be the engine changing revs to accomodate the draw on power for the AC.

[david173]

Yeah if I'm sitting stationary just after starting up and switch on AC it'll kind of rumble and lose power, almost similar to when you engage too high a gear, and the rev needle with shake down a bit! Naughty AC stealing engine power!