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If you searched for "router red light", the useful answer is not just a colour chart. You need to know whether the light is normal, whether the internet is actually down, and what to check without making the problem worse. Router and modem lights are not perfectly standard across brands, so always match the colour to the label beside the light and the exact model. Still, the pattern below will solve most home cases. Quick answer: A red router light commonly points to no internet connection, a service fault, overheating, authentication failure, or a hardware problem, depending on the model. What it usually means Red is a stronger warning than orange on most home networking gear. It can mean the router cannot authenticate, cannot reach the provider network, has lost the WAN connection, is too warm, or has entered a fault state. Verizon documentation for one Fios router says a solid red internet light means the router is not connected to the internet. NETGEAR cable modem guidance also uses a solid red power LED to warn that the modem is too warm and might overheat. The key is to separate three things: power, local Wi-Fi, and the connection to the provider. A router can broadcast Wi-Fi even when the modem or fibre box has no internet. Likewise, an Ethernet light can blink simply because traffic is moving, not because anything is wrong. Common causes include: Provider outage or failed line signal.; Loose WAN, coax, DSL, or fibre connection.; Router or modem overheating in a closed cabinet.; Bad power adapter or unstable power outlet.; Firmware problem or failed boot after an update. Fix it in this order Feel the router. If it is hot, move it into open air and let it cool. Check the main internet cable without tugging on fibre or wall equipment. Restart the modem, wait until it is stable, then restart the router. Test internet with a wired device if possible. Check for local outages using mobile data. Contact support if the red light returns after a clean reboot. What not to do Avoid opening provider-owned equipment or unplugging fibre from a wall ONT unless your provider specifically instructs you to do it. Also avoid changing advanced settings such as VLAN, PPPoE, bridge mode, or DNS unless you know why you are changing them. A normal reboot is safe; a factory reset is a last resort because it can erase Wi-Fi names, passwords, and custom settings. When to get help Get help quickly if the red light appears on both the modem and router, if you smell burning plastic, or if the device keeps shutting down. When contacting support, give the exact device model, the light label, the colour, whether it is solid or blinking, and how long it has been happening. That detail is far more useful than saying only that the router is broken. FAQ Q: Does red always mean the router is broken? A: No. It can be a provider-side outage, line problem, authentication issue, overheating, or a bad cable. Q: How long should I wait? A: After a restart, give most routers at least five minutes. Some gateways take longer after firmware updates. Q: Will a factory reset fix it? A: Sometimes, but it wipes custom Wi-Fi names and settings. Try a normal reboot and cable check first. See Also: Router Orange Light: Meaning and Quick Fixes

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