Ok bad luck is back.. This morning when i started the computer i heard a loud humming and the cpu temps skyrocketed.
The pump has failed i think as it wont spin just hum.. if i help the rotor it spins slowly half a round or so but stops right away.
The rotor itself can be rotated easily with manual labour so it's not stuck or anything..

I don't know if the corsair psu sent a spike through it or anything but i'm beginning to think the pump got damaged when delivered, it was loose in the box and had no padding.
Before i send it to RMA do you have any suggestions and is it possible to open it to check the electronics without the store noticing?
I repair 3G base system boards for a living so the pump electronics shouldn't be that hard to figure out.