channel 805 keeps freezing up

The concern is not "Home Networking" help related.......... Topic moved here to the TV help section for assistance. 

Audio and video problems happen when the signal for the channel you are trying to watch is too weak or has too much noise. This might be because of a bad cable box or a problem at Comcast (check https://www.xfinity.com/support/status/, 1-800-Comcast voice response, or the Xfinity app) but is most likely due to a poor connection between the box and Comcast's network, usually in or near your home.

Troubleshoot by checking all connectors for corrosion and tightness, and by looking for damaged coax cable. Running the cable through a surge protector, a defective splitter, or too many splitters can cause signal problems as well. If there is an amplifier in the line make sure it's getting power. You might also try unplugging the cable box/DVR/digital adapter power cord for a minute or so.

If you can't find the problem or you'd rather have Comcast take care of it and an employee does not respond to your message here, call them at the phone number on your bill or 1-800-Comcast, or use one of the options on https://www.xfinity.com/support/contact-us/. Ask them to check the account setup and send a refresh signal to the box. If they can't fix the problem remotely, insist they send a tech out to identify the cause and correct it.

If the tech finds bad coax, splitters, amplifiers, or connections in your home (even if Comcast originally supplied them) you'll probably have to pay for the visit (approx. $100) unless you have their Service Protection Plan (https://www.xfinity.com/support/articles/service-protection-plan, closed to customers that don't already have it). If the trouble is due to a faulty Comcast cable box/DVR/digital adapter or anything outside your home, you shouldn't be charged.

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Hello user_iqpi16

Have you tried to troubleshoot the service using the Xfinity app? I am a huge fan of the app, it makes things so easy to investigate issues like this. 

Using the Xfinity app, you can fix issues with your Xfinity TV service such as picture and sound problems, remote control trouble, error codes, and more.

Troubleshooting your video service using the app

1. Open the app.
2. Tap the Services tab.
3. Tap Troubleshoot TV issues.
4. Tap the applicable option to start troubleshooting.