Xfinity Modem Solid Green Light: Meaning & Fix
Quick Conclusion
A solid green light on an Xfinity modem (e.g., XB7 or XB8) typically indicates normal operation, meaning the device is powered on, booted successfully, and has established a stable connection to the ISP network. This is a routine status and not a failure, but it can sometimes mask underlying issues like firmware updates or minor connectivity glitches that require user action.
Engineer's Pro-Tip
Xfinity modems like the XB7 have a hidden diagnostic mode: unplug the modem, wait 30 seconds, plug it back in, and immediately press and hold the WPS button for 30 seconds until lights flash in a pattern. This triggers a factory reset and can reveal underlying hardware issues not shown by the solid green light.
Community FixReddit
"This traffic light is showing solid red and green at the same time."
Idk, this picture is giving me mixed signals here.
Read original threadWhy is this happening?
- Normal operation after successful boot and DOCSIS provisioning from Comcast's backend
- A recent firmware update completed, leaving the modem in a stable state
- The modem is in bridge mode or a custom configuration that maintains a steady connection
- ISP network is fully operational with no outages detected in your area
Step-by-Step Fix Flow
Check for internet connectivity via device test
Connect a device via Ethernet to the yellow WAN port or Wi-Fi, then open a browser to test sites like google.com. If no internet, use the xFi app or visit 10.0.0.1 in a browser to check for alerts or outages.