Although Xfinity router ensures it can handle some bugs but here are some quick fixes when you’re wondering, why is my Xfinity router not working? Here are some ways to ensure your router is working. Restart your modem through My Account online, go to the internet service tab, and scroll down to devices and select restart modem. Start troubleshooting which can take up to ten minutes. Ensure your account is updated. Try moving closer to the router for better connectivity.