When your Wi-Fi keeps disconnecting, it rarely does so randomly. There's almost always a pattern: drops every few minutes, drops when you move rooms, drops only on one device, drops when the microwave runs. Each pattern points to a different cause, and knowing which one you're dealing with cuts the fix time from hours to minutes. This guide works through the most common culprits in order of likelihood.
Start with the basics: power-cycle your router
Unplug your router from the wall. Wait 30 seconds. Plug it back in and give it 90 seconds to fully restart. This clears the router's memory tables and re-establishes a clean connection with your ISP. It won't solve every problem, but it fixes a surprising number of intermittent drop issues caused by the router getting stuck in a bad state. If your router has a separate modem, restart both, modem first.
If the drops stop after a restart but come back within a day or two, the router itself is the problem. Routers that restart themselves or drop connections regularly are either overheating or approaching end of life. Check for firmware updates before writing the hardware off.
Check for interference and channel congestion
Wi-Fi uses shared radio spectrum. If your neighbours' routers are broadcasting on the same channel as yours, your connection competes for airtime and drops become frequent. This is the single most common cause of Wi-Fi disconnections in apartments and terrace houses.
Log into your router's admin panel (usually at 192.168.1.1 or 192.168.0.1 in a browser) and look at the wireless settings. If the channel is set to "auto", the router picks a channel at startup but doesn't adjust after that. Set it manually to channel 1, 6, or 11 on the 2.4 GHz band; those are the only three that don't overlap. On 5 GHz, any non-overlapping channel works. A free app like Wi-Fi Analyzer (Android) or the Wireless Diagnostics tool built into macOS shows which channels nearby networks are using, so you can pick the clearest one.
Microwaves, baby monitors, and older cordless phones also broadcast on 2.4 GHz. If drops happen in short bursts while appliances are running, switch affected devices to the 5 GHz band.
Device-specific drops: power management is usually the culprit
If the disconnection only happens on one device (a laptop, a phone, a smart TV) while other devices stay connected, the problem is almost certainly on that device rather than the router.
On Windows laptops, the Wi-Fi adapter's power management setting is the first place to check. Windows puts the adapter to sleep to save battery, which causes the connection to drop. Fix it by opening Device Manager, expanding "Network Adapters", right-clicking your Wi-Fi adapter, choosing Properties, then the Power Management tab, and unchecking "Allow the computer to turn off this device to save power". On macOS, check System Settings under Battery; "Enable Power Nap" can cause similar issues on older Macs.
On Android phones, look for a "Wi-Fi power saving mode" under advanced Wi-Fi settings and turn it off. iPhones handle this differently and rarely drop due to power management, but a stale network profile causes similar symptoms. Go to Settings, Wi-Fi, tap the network name, choose Forget This Network, then reconnect.
Weak signal: distance and obstructions
A device on the edge of a router's range will connect but drop constantly, because the signal-to-noise ratio is too low to maintain a stable session. Thick concrete walls, metal studs, and large appliances all reduce range significantly. If drops only happen in certain rooms, signal strength is the cause.
Moving the router to a more central location is the most effective single fix. Routers placed in corners, inside cupboards, or on the floor perform noticeably worse than those placed high and in the open. If the layout of your home makes centralising difficult, a mesh Wi-Fi system or a Wi-Fi extender can extend coverage to dead zones without the drops that come from pushing a single router too far.
For more detail on diagnosing and solving whole-home coverage problems, the guide on how to improve Wi-Fi coverage in large homes covers the full toolkit, from access point placement to mesh system configuration.
Router firmware and driver updates
Outdated router firmware causes stability bugs that manufacturers patch in later releases. Log into your router's admin panel and find the firmware update section, usually under "Advanced" or "Administration". Most modern routers check for updates automatically, but many don't install them without manual confirmation.
On the device side, Wi-Fi adapter drivers can also cause drops. On Windows, open Device Manager, right-click the Wi-Fi adapter, and choose "Update driver". On a Mac, driver updates come through the standard macOS software update process. It's not a glamorous fix, but a driver update has resolved persistent disconnection issues on otherwise healthy machines.
IP address conflicts
Your router assigns each device an IP address when it connects. If two devices on the network end up with the same IP, one or both will drop off. This is rare on home networks with DHCP enabled, but it does happen when a device has been assigned a static IP that falls inside the router's dynamic range.
To check: on Windows, open Command Prompt and type ipconfig /release then ipconfig /renew. This forces your device to request a fresh IP. On a Mac, go to System Settings, Network, Wi-Fi, Details, and click "Renew DHCP Lease". If the drops stop, an IP conflict was the cause. Log into your router's admin panel and assign the conflicting device a reserved IP outside the DHCP pool.
ISP and line issues
Not every disconnection originates inside your home. If the router's internet light is flashing or going red during drops (rather than the Wi-Fi light), the problem is upstream: either the connection between your router and the ISP, or the ISP's own network. Run a continuous ping to 8.8.8.8 in a Command Prompt or Terminal window while the drops happen. If the ping times out at the same moments Wi-Fi drops, the fault is local. If the ping stays solid but browsing fails, the DNS is likely the issue; try switching your router's DNS servers to 1.1.1.1 (Cloudflare) or 8.8.8.8 (Google).
Persistent upstream drops warrant a call to your ISP. Ask them to check line statistics remotely; they can often see errors on the line that aren't visible from your end. If you're on the NBN and your connection keeps dropping at the router level, the troubleshooting process overlaps significantly with the steps in the article on NBN connected but no internet.
When to replace the router
Routers are not indefinite devices. Consumer-grade routers typically hold up for 3 to 5 years before firmware support ends and hardware starts degrading. Signs that the router itself needs replacing: it runs hot to the touch, it restarts on its own, dropping connections persist across all devices after every other fix has been tried, and no firmware update is available because the manufacturer stopped supporting the model.
If you're buying a new router, check whether Wi-Fi 7 hardware suits your situation. The latest standard offers improved reliability in congested environments, which addresses one of the main causes of persistent drops in dense housing areas.