If you prefer the secret question recovery method, so you will have to provide the right answers to the secret questions that you had set up while the account was created.
Also, you will need to mention your zip code.
Or if you prefer the recovery email address recovery method, then you will get a password reset link by Comcast.
Choose one appropriate method and complete the on-screen instructions to Reset Comcast Password.
Finally, create a new password for your Comcast account, and re-enter the password to confirm it.
Click on the Save.
This is the simple online process for reset password. For Instant support contact Xfinity Live Person + 1-888-653-7618