Thank you for such quick reply, it was a surprise.
Yes my overheating is very weird, it increases exactly by 5 degrees C, from boot temp until 90 or so when I manually shut it down so as to not fry my pc. I've never seen such systematic overheating like this.
I've never handled the cooler in a rough manner. I wonder why it is failing now.
I have a digital copy of the invoice, I hope that is enough.