Hi Lawson Sparks,
Thank you for reaching Microsoft Community. I am sorry to hear about what happen with your replacement device. This is definitely not the experience we want you to have. Let me help you on this but we need to go through a set of troubleshooting to isolate what is cause of the problem. Allow me to ask few question on your end.
Does this happen when the Surface is running on battery power or when it's charging?
Overheating also happens when there are too may processes running on the background. When using the Surface to run programs that use the CPU, it's best that you set the power mode to Better or Best performance. You can see this by clicking on the battery icon on your taskbar.
I suggest to do the following steps below and see if issue persist.
1. Force the device to shut down and restart
Press and hold down the power button until your Surface shuts down and restarts and you see the Windows logo screen (about 20 seconds), then release the power button.
2. Run Surface Diagnostic Toolkit
See: Fix common Surface problems using the Surface Diagnostic Toolkit (microsoft.com)
3. Run the system file checker to check if there are corrupted system files that are just looping around causing this kind of issue to exist. To run the system file checker, kindly type Command Prompt on the search box next to the Windows icon and run it as administrator. Once done, type and enter sfc /scannow.
Let it load, detect and repair those corrupted files. Whether it detects a corrupted file or not, kindly restart your Surface device afterwards.
4. Also check Task Manager (Ctrl + Shift + Esc) and click on the CPU column to see which programs may be consuming the device's resources, thus, causing the device to heat. If you see that a specific program is consuming CPU usage beyond normal, I suggest you update or uninstall then reinstall the app.
If issue persist, try disabling the GPU hardware acceleration in Microsoft Teams and see if this would help.
- Open Microsoft Teams. Click on your profile photo and then click on Settings
- Under application select Disable GPU hardware acceleration (requires restarting Teams)
- Close the Microsoft Teams. Clicking on the close button in the Microsoft Teams will not kill the process, but minimize it to the taskbar. You should close the Microsoft Teams via Task Manager or by doing right click on the Microsoft Teams in the taskbar and then click Quit.
- Open Microsoft Teams and check if the problem persists.
Let me know how it goes.
Kind regards,
Lavenia