Any connectivity-related issues or an internal hardware glitch can trigger an Xfinity Modem orange light. To resolve this problem, follow the below-mentioned troubleshooting steps:
Connect your router to your device directly using an Ethernet cable.
Turn off the router and disconnect the power adapter from the electric socket.
Wait for two minutes and then reconnect the power adapter into the electric socket.
Turn on the router and check if the issue is resolved. If the issue persists, reset the router.
Press and hold the reset button of the router for 10 seconds and then release it.