Does your brand new MacBook Pro go into meltdown when it’s plugged into power? Do the fans spin up into a blast of white noise, while the heat makes your hands sweat as you type? Is your kernel\_task pegged using 100% of the CPU when you check things out in the Activity Monitor app?
If so, don’t worry — it’s not your Mac’s fault. It’s you. You’re charging it wrong.
Yes, if you plug your USB-C power cable into the left-hand side of your MacBook Pro, you might make it overheat.
Right isn’t wrong
It appears that some MacBook Pro models are more sensitive to heat on their left side than they are on the right. If you plug the power cable into the “wrong” side, the increased heat caused by charging may trip the temperature sensors, and send the fans a-spinning. This Stack Exchange thread discusses the strange situation, with this post from user Bmike detailing the steps that can be taken to induce and mitigate the problem.
Read more at CultOfMac.com