Router Not Working? How to Fix It Step by Step

A router not working can throw your whole household offline in seconds, and it's rarely obvious whether the fault lies with your hardware, your cables, or your internet provider. The good news is that most router problems follow a predictable pattern, and working through them in order usually finds the culprit within 15 to 20 minutes. This guide walks you through that process step by step, from checking the lights on your router to deciding whether it's time for a replacement. No technical background needed, just patience and a willingness to unplug a few things.

What You'll Need

• Access to your router and its power cable
• Your broadband provider's app or a phone to call them
• A laptop or phone you can connect directly via Wi-Fi or Ethernet
• A pen or paper if you want to note down which steps you've tried
• About 20 to 30 minutes, longer if you end up contacting your ISP

Step 1: Check the Lights on Your Router

Before touching anything, look at the front of your router. Most UK routers, including BT Smart Hubs, Virgin Media Hubs, Sky Hubs and TalkTalk routers, use coloured lights to show their status.

1. Look for a solid white, blue or green light, which usually means everything's working normally.
2. An orange, amber or flashing red light often points to a connection problem between your router and the exchange or network.
3. No lights at all usually means a power issue rather than a broadband fault.

Each provider uses slightly different colours, so it's worth a quick search for "[your provider] router lights meaning" if you're unsure. This single check often tells you whether you're dealing with a power problem, a line problem, or something else entirely.

Step 2: Check the Physical Connections

Loose or damaged cables cause more router problems than people expect. It's an easy thing to overlook because the cables rarely move once they're plugged in.

1. Check that the power cable is firmly seated in both the router and the wall socket.
2. Follow the broadband cable (usually grey or white) from the router to the phone socket or wall outlet, and make sure it's pushed in fully at both ends.
3. If you have a separate modem and router, check the cable connecting the two as well.
4. Look for any visible damage, kinks, or chew marks if you have pets.

If everything looks fine but you're still unsure where the problem starts, our guide on how to diagnose home network problems step by step covers a broader checklist that's worth running through alongside this one.

Step 3: Restart the Router Properly

This sounds obvious, but there's a right way to do it that actually clears the router's memory rather than just flicking it off and on too quickly.

1. Switch off the router at the wall, not just the device's own power button.
2. Wait at least 30 seconds. This gives the router time to fully discharge rather than just rebooting instantly.
3. Plug it back in and wait. Most routers take two to five minutes to fully reconnect and show stable lights.
4. Avoid unplugging it again during this window, even if the lights look odd at first.

If this fixes things, great. If you find yourself restarting the router often, that's usually a sign of an underlying issue rather than a one-off glitch, and it's worth reading our guide on why your Wi-Fi might be slow or why your connection keeps dropping for more specific fixes.

Step 4: Test With a Wired Connection

Before you blame the router entirely, it's worth confirming whether the problem is with the router itself or just your Wi-Fi.

1. Connect a laptop directly to the router using an Ethernet cable.
2. Try loading a website or running a speed test.
3. If the wired connection works fine but Wi-Fi doesn't, the fault is likely with your wireless settings rather than your internet connection.

This distinction matters a lot, because it changes what you need to fix. If wired works but Wi-Fi doesn't, check our guide on 2.4GHz vs 5GHz Wi-Fi to rule out a band-related issue, or look at what size router you need for your house if coverage seems to be the real problem.

Step 5: Check if It's Just One Device

Sometimes a "router not working" problem is actually a single device problem in disguise. If your phone can't connect but your laptop can, the router itself is probably fine.

1. Try connecting a different device to the same network.
2. If other devices connect without issue, the problem sits with that one device, not your router.
3. Restart the problem device and forget the network on it before reconnecting.

For a detailed walkthrough of this specific scenario, see our guide on Wi-Fi not working on one device but fine on others.

Step 6: Rule Out an ISP Outage

Before you spend more time resetting things, check whether the problem is actually on your provider's end. This happens more often than people realise, especially during bad weather or scheduled maintenance.

1. Use your mobile data to check your provider's status page or social media accounts. BT, Virgin Media, Sky and TalkTalk all have outage checkers on their websites or apps.
2. Search "[your provider] outage" or "[your provider] down" to see if others are reporting the same issue in your area.
3. Ask a neighbour on the same provider if their connection is working, if that's easy to do.

If there's a confirmed outage, there's genuinely nothing to fix on your end. Restarting the router repeatedly won't help, and it's best to just wait it out and check back every hour or so.

Step 7: Run a Factory Reset (Last Resort Before Replacing)

If you've worked through the steps above and nothing has helped, a factory reset can clear out corrupted settings that a normal restart won't fix. This is a bigger step, so treat it as something you try only when the basics haven't worked.

1. Find the small reset button, usually on the back or underside of the router. You'll likely need a pin or paperclip to press it.
2. Hold it down for 10 to 15 seconds, or check your router's manual for the exact timing since this varies by model.
3. Wait for the router to fully restart, which can take several minutes.
4. You'll need to reconnect all your devices and re-enter your Wi-Fi password afterwards, as this wipes custom settings.

A factory reset undoes any changes you've made, including custom Wi-Fi names, passwords, port forwarding rules and parental controls. If you've set any of that up, write it down first if you can. Once you're back online, running a broadband speed test is a good way to confirm things are genuinely back to normal rather than just appearing to work.

Step 8: Know When to Replace the Router

Sometimes the router itself is simply worn out, and no amount of resetting will fix that. A few signs point to replacement rather than repair:

1. The router is more than five or six years old, especially if it was supplied by your ISP as a basic bundled model.
2. It overheats, feels hot to the touch, or has visible wear on the ports.
3. Problems keep recurring even after a factory reset and fresh setup.
4. You've outgrown it, for example you've moved to a larger property or added far more connected devices than when you first got it.

If coverage rather than outright failure is the issue, it's worth reading about what size router you actually need before buying a replacement, since a bigger house often needs mesh units rather than just a stronger single router. For anyone setting up a more permanent wired network alongside a new router, our home network wiring guide covers switches, patch panels and access points in more detail.

Common Mistakes to Avoid

• Unplugging and replugging the router repeatedly within seconds, which doesn't give it time to fully reset.
• Assuming a factory reset will fix an ISP outage. It won't, and you'll just lose your settings for nothing.
• Forgetting to check cables because they "look fine", when a loose connection is one of the most common causes of router problems.
• Blaming the router when the issue only affects one device, which wastes time resetting something that wasn't broken.
• Skipping the ISP outage check and spending an hour troubleshooting a problem that was never on your end.
• Buying a new router before confirming the old one is actually the problem, rather than a coverage or settings issue.

Conclusion

When your router not working turns your evening upside down, working through these steps in order takes the guesswork out of it. Start simple with lights and cables, move on to restarts, then check whether it's an ISP outage before you consider a factory reset or replacement. Most of the time, the fix is far simpler than it first appears, and you'll be back online well before you need to call anyone.

FAQ

Why has my router stopped working suddenly with no warning?

Sudden failures are often caused by a power cut, a loose cable that's shifted slightly, or an ISP outage rather than the router itself failing. Check the lights first, since they'll usually point you toward power, line, or internet issues straight away.

How long should I leave my router unplugged when restarting it?

At least 30 seconds is enough for most routers to fully discharge. Leaving it unplugged for a minute or two doesn't cause any harm and can help if the router was particularly unresponsive.

Will a factory reset delete my Wi-Fi password?

Yes, a factory reset wipes any custom Wi-Fi name and password you've set, returning the router to its default settings. You'll find the new default login details printed on a sticker on the router itself.

My router's lights look normal but I still have no internet. What's wrong?

This usually points to an ISP outage, a problem with the line itself, or an issue specific to your device rather than the router. Check your provider's outage page and try a wired connection to narrow it down.

How do I know if it's my router or my ISP causing the problem?

Connect a device directly to the router with an Ethernet cable and try loading a website. If that doesn't work either, the issue is more likely with your broadband connection or your provider rather than your router's Wi-Fi settings.

Is it worth repairing an old router instead of replacing it?

Routers aren't usually designed to be repaired, and replacement is almost always more practical once one is several years old or failing repeatedly. A new router is often cheaper than you'd expect and brings better Wi-Fi coverage as a bonus.