Leaping ahead....if someone forgot to put the thermal pads on....you should be able to buy these online, not sure where in Sweden....either get a friend or do it yourself
here is an image of where to put the thermal pads.
https://imgur.com/TAVvf1ithe image I grabbed off the internet called them thermal tape, probably because they bought a roll of tape and cut it to size. When I bought my kit, it came with 3 thermal pads.
They will have a protective tape over them which needs to be removed for good heat transfer
My brain does not always work.....but I can assure you "thicker is better"