Notebook Hardware and Upgrade Questions

Dear forum, 

10 days ago I recieved my new HP spectre x360. Actually, this is the second one. The first one had a loose trackpad and battery issues, but thats not what I want to talk about.

Everything seems to be very fine with this laptop, except for the fact that the fans are always running when charging. When unplugged, the fans never come on and it's very quiet.

A few minutes after the charger is plugged in though, the fans start running. I check task manager and HWmonitor everytime, and I find that even though the laptop is running at idle (1-5% cpu), the CPU is around 40-50C.

When the laptop is off the charger, it can also push 50C, but the fans won't kick in. Most of the time, its more at like 35C.

So the laptop is doing nothing but charging, but the fans make a lot of noise. I wouldn't go sit in the library at my university charging the laptop because everyone will be looking annoyed at me.

I've tried a couple of things:

- Putting the laptop in enery-efficient mode when plugged in. I don't do heavy work on the laptop, so it is still enough power, but I don't think this should be necessary on a laptop with this much capability. Putting it in energy-efficient mode does nothing for the fans though.

- Installing the latest BIOS from jan. 24th (I think). I also set some energy mode in the bios from 'performance' to 'balance'. Again, this did nothing for the fan noise. 

Again, the laptop does absolutely nothing, while that fans are still making a lot of noise. 

Youtube video, not very useful but just an indication of the problem: https://youtu.be/ba7WbGalAhQ

Hopefully someone can tell me what to do, I have until tuesdag feb. 13th to return it. 

Thanks in advance, greetings from the Netherlands.

Specs:

HP Spectre x360 13-ae001nd

Windows 10 64-bit

i5-8250U, 8GB RAM, 256GB SSD