Log into fancast.com and click the "Sign In" button located in the upper right-hand corner of the page. Type in your Comcast e-mail address and password on the next page.
Click the "What's On TV" tab followed by the "Browse TV Listings" tab. Enter your zip code if the site prompts you, so Comcast can give you accurate show times for your area.
Click the blue "My DVR Manager" icon located in the upper right-hand corner of the page to review the recordings you've already scheduled. They should appear in order of date and time.
Press the "Menu" button on the Comcast remote to bring up a series of icons located at the bottom of your TV screen.
Choose the "DVR" icon to pull up another window.
Select "My Recordings" to view your list of scheduled DVR recordings. Note the percentage located next to your "My DVR Recordings." title bar. This indicates the amount of DVR space you've used up with your already recorded programs. Delete old shows by selecting them, choosing "Options" and then selecting "Delete."