Just a few questions to help us troubleshoot.
Are you getting a specific error or screen message in the app? If so, please post a screenshot.
Also, Have you tried to reboot the touchscreen?
Have you tried to uninstall and reinstall the XFINITY Home App?
Hi TheWolfePit. I can assist with further troubleshooting, and create an Advanced Repair ticket for you if the issue persists. I'll need to gain access to your account. Please send me a private message and include your full name, service address, and account number so I can access your account.