How do I run a channel auto scan

My screen shows the message Please run channel auto scan. ...

That message is most likely being generated by your TV set, not by Comcast/Xfinity. Scans are only need to receive over-the-air channels picked up by an antenna connected to the set. Check the user guide for your set for instructions. You'll probably need to use the TV set remote for this, the Xfinity remote probably won't work for channel scan. 

You don't need to run a scan to receive cable channels, you get them through an HDMI cable connected to a cable box, or through an Internet connection to your set for the Xfinity Stream app. Neither of these use a channel scan.

Greetings, @user_yjr6bm! I hope your week has been treating you well. Thanks so much for taking a moment out of your busy day to leave a post on our community forum about this auto scan message. You have definitely come to the right place for assistance.

Thank you for jumping in on this one, @BruceW! I just had to replace my TV a few days ago, and I got the exact same message when I was setting up the new one. As long as you are able to get the signal from your cable box on your selected HDMI input channel, or you have downloaded and logged in to the Xfinity Stream app from your TV's app store, you should be just fine, and you can ignore the auto scan request. As @BruceW mentioned, the "TV" function on these devices is generally only utilized when you have an antenna connected to pick up over-the-air channels.

Please let me know if you have any other questions or concerns. Our amazing community is always ready to help, 24 hours a day, 7 days a week.

The concern is not "Home Security Devices And Equipment" help related........... Topic moved here to the TV help section.