Hi Jeniceksafl!
Thanks for reaching Microsoft Community. We're here to help and let's work on this together.
Regarding your query, any form of tampering on the device will void the warranty of your Surface device. Please see through this link Surface warranty: FAQ - Microsoft Support for more information on your warranty.
Before sending in your device for repair, you can also try these troubleshooting steps below to try and fix the issue on the fan of your Surface device.
Before considering any troubleshooting options, please first make sure your device is up to date. To check for updates, just follow these steps:
Start> Settings> Update & Security> Windows Update> then check for updates and install any available updates.
Run Surface Diagnostics Toolkit and complete task here Fix common Surface problems using the Surface app and Surface Diagnostic Toolkit - Microsoft Support.
Please let us know how it goes. We look forward to hearing from you.
Greetings,
RodelioP.