WiFi Not Working? Electrician's Troubleshooting Guide UK

If your WiFi has stopped working, nine times out of ten it's not an electrical fault—it's either your router losing power, your device disconnected, or interference from household appliances. Before you phone your internet provider or a technician, you can rule out most problems yourself in about 20 minutes by working through the basics systematically. As a qualified electrician who's spent years in North East England homes, I've learned that a lot of "WiFi problems" are actually simple connectivity issues or power hiccups that homeowners can fix immediately.

WiFi Not Working: Where to Start

Start with the obvious: can you see the router? Is it plugged in? Can you hear it running? If the lights on your router are off or flashing red instead of green, you've found your first clue.

Before you do anything else, check whether the problem is widespread or isolated. Try connecting another device—a phone, tablet, or laptop—to the WiFi. If nothing connects, the issue is your router or broadband connection, not your original device. If one device connects fine but others don't, the problem is likely with those specific devices.

Write down exactly what you see: Are WiFi networks appearing in your device list? Is the router powered up? Is there an internet light on it? These details will matter if you need to contact your broadband provider later.

Check Your Router Power and Connections

This sounds basic, but it works more often than you'd think.

Visually inspect the power cable running to your router. Is it plugged into a socket? Is that socket actually switched on? Check the wall switch—sometimes a family member switches off the socket ring without realising. If it's plugged into an extension lead or power strip, check that the extension is also switched on and hasn't tripped an RCD (residual current device), which you'd see as a popped switch on the plug.

Look at the cables going into the back of the router itself. Your broadband connection cable (usually from your wall socket or a master socket) should be firmly seated in the "line" or "broadband" port. The Ethernet cable, if you're using one, should be snug. These ports are designed to stay put, but they can work loose, especially if the router's been knocked or if a pet has been near it.

If everything looks connected, try reseating the cables—pull them out and push them back in firmly. You'll often hear or feel a click.

Restart Your Router Properly

Don't just switch it off at the wall and back on again.

Proper restart procedure:

1. Switch off the power at the wall.

2. Wait 30 seconds—this genuinely matters. It allows the capacitors in the router to discharge fully.

3. Switch the power back on.

4. Wait 3–5 minutes for the router to fully boot up. You'll see the lights cycle through colours, then settle into a steady pattern.

If that doesn't work, perform a factory reset. On most routers, you'll find a small recessed button (often labelled "Reset"). Using a straightened paperclip, hold it down for 10–15 seconds while the router is powered on. The lights will flash, and after a minute or two, the router will restart with factory default settings. You'll then need to log in again using the credentials printed on the router label and set up your WiFi name and password from scratch. This is more disruptive, so try the standard restart first.

Check WiFi Signal and Distance

Even if your router is working, weak signal can feel like WiFi isn't working at all.

Open the WiFi settings on your device and look at the signal strength. On most phones and laptops, it's shown as a series of dots or bars. If you're seeing just one or two bars at the far end of your house or in the basement, that's your answer. WiFi is absorbed by walls, especially older properties with stone or thick brick construction common in the North East.

Quick fixes:

• Move your router to a higher, central location (hallway is often better than under the stairs).
• Move it away from the floor—it broadcasts better from eye level upward.
• Avoid cupboards and enclosed spaces.

If signal is strong but you're still not connecting, move closer to the router and try again. This rules out distance as the problem.

Look for Electrical Interference

This is where my trade knowledge comes in handy.

Microwave ovens are the classic culprit. They emit electromagnetic radiation that interferes with WiFi—not because they're unsafe (they're shielded), but because their frequency overlaps with WiFi bands. If your WiFi drops when someone uses the microwave, that's your problem. The fix is simple: move your router away from the kitchen or position it so a wall is between the router and microwave.

Other sources of interference include:

• Cordless phones (especially older ones)
• Bluetooth speakers, especially if many are paired
• Baby monitors
• Electrical equipment that generates a lot of heat (some heaters, older televisions)

You won't need an electrician for this—just relocate the router or the interfering appliance.

Verify Your Device WiFi Settings

Sometimes the device itself has been disconnected or has outdated network settings.

On your phone or laptop, "Forget" the WiFi network and reconnect. Look for your network name (SSID) in the available networks list, select it, and enter the WiFi password (found on the router label). On some devices, if the network hasn't been used in a while, it can retain old connection details that cause problems.

Check that WiFi is actually switched on in your device's settings. On phones, swipe down to see quick settings—is the WiFi icon highlighted? On a laptop, check the function keys or system settings.

Check Your Broadband Connection

Even if your router is powered and working, if your broadband connection is down, you won't have internet.

Look at the internet or line light on your router. It should be solid green or blue (depending on the model). If it's off, flashing, or red, your broadband connection isn't live.

Check whether there are any reported outages in your area. Your internet provider's website usually has an outage checker—enter your postcode. On your phone, use mobile data to check this, not your WiFi.

If you're on FTTC (fibre to the cabinet) or FTTP (fibre to the premises)—which cover most of North East England now—the connection is only as good as the equipment in your network termination point (the small box where the fibre enters your home). Make sure it's plugged in and switched on.

When to Call Your Internet Provider

Once you've worked through the above, if you still have no internet, phone your broadband provider's technical support. Have the following ready:

• Your postcode and account details
• What lights you're seeing on the router
• Whether one device or all devices are affected
• Whether the problem is constant or intermittent

They can run a line test from their end and tell you whether the fault is in your home or on the network.

When Electrical Work Might Be the Issue

Rarely, but occasionally, a WiFi problem is an electrical problem.

If your router keeps losing power intermittently, the socket it's plugged into might be faulty. Test by plugging in a lamp or phone charger—if those also lose power intermittently, the socket is the problem.

If you're constantly tripping the RCD when the router is plugged in, there's a potential fault. RCDs are safety devices designed to protect you from electric shock—they're very sensitive. A faulty router can cause nuisance trips. Unplug the router and see if the RCD still trips. If it doesn't, the router may be faulty (and should be replaced). If it does, there's a fault elsewhere on that circuit, and you'd need a qualified electrician to investigate.

Under UK regulations (BS 7671), all circuits in your home should be RCD protected. If you find an old property where the socket your router is plugged into isn't RCD protected, that's a compliance gap, but it's not the reason for your WiFi being down—it's a safety issue to address separately.

Frequently Asked Questions

Can a power surge damage my router and stop it working?

Yes. A significant surge (from a lightning strike, for example) can blow components in a router. You'd usually see physical damage—burnt marks around the power port—or the router simply wouldn't power on at all. A surge protector or UPS (uninterruptible power supply) won't prevent that kind of damage; only a whole-home surge protector fitted at your consumer unit would help, which costs £150–300 fitted. For most people, replacing a dead router (£30–150 depending on spec) is the practical solution.

Does WiFi stop working in cold weather?

Not directly, but routers can be sensitive to temperature. If your router is in an unheated garage or shed and it's below freezing, it may not function properly. They're designed to work between 0°C and 40°C. Bringing it indoors usually solves it.

Is WiFi dangerous if I have an electrical fault nearby?

No. WiFi signals are non-ionising radiation at very low power levels. They're completely separate from the electrical current in your wiring. An electrical fault (like a loose connection causing arcing) is a fire hazard, but it won't affect WiFi performance.

Why does my WiFi drop when I use certain appliances?

As mentioned, microwave ovens are the main culprit due to electromagnetic interference. Some washing machines and tumble dryers can also interfere briefly during certain cycles. It's not dangerous—just annoying. Relocating your router is the solution.

Should I leave my router on all the time?

Routers are designed to run continuously, and leaving it on doesn't significantly shorten its life. However, doing a weekly restart (powering off for 30 seconds, then back on) can help maintain stability, especially on older routers. If you want to save a small amount of electricity, putting it on a timer to power down overnight is fine, though you'll lose internet until it restarts.

---

If you've worked through this guide and you're still stuck, or if you suspect an electrical fault with the socket or wiring itself, get in touch. We're [Energy North Ltd](https://energynorth.uk), qualified electricians serving North East England. We can check your circuits, test sockets, and advise on earthing and RCD protection—the electrical side of things that go beyond WiFi troubleshooting. Give us a call if you'd like a second opinion.