Pod noise

Some second-generation pods have an internal cooling fan to regulate their temperature. If you have this model and notice a loud noise, it could indicate a problem with the fan.

It may be malfunctioning or the blades are loaded with dust. It's quite a common problem here. You could try blowing it out with some canned air. If that doesn't work, there is no fix other than to get it swapped out for another one by them. Taking it to your local Xfinity store to be swapped out for another would be the fastest option, or ship it back for free via UPS and have them ship you another one. You can also choose to pay for a UPS pick up at https://www.ups.com/us/en/business-solutions/pickup-dropoff-options/ups-on-call-pickup.page or by calling 1-800-PICK-UPS.

https://www.xfinity.com/support/articles/returning-your-equipment  

Hey there, user_iz9dti! Thanks for taking the time to bring your pod concerns to our attention. Rest assured, you have reached the right team to assist you! As @EG mentioned, if this issue remains persistent, then it will be best to request a replacement pod. If you wish to request your pod replacement through shipping, please send our team a direct message with your full name, the name listed on the account (if different), and the service address associated with your account.
To send a Direct Message, please click on the “Direct Message” icon in the top-right corner of the screen, next to the bell icon click the "New message" (pencil and paper) icon then type or select "Xfinity Support". Type your message in the text area near the bottom of the window and press Enter to send your message and initiate a live session.