The most common reason is interference or distance from your router, not your internet service itself

When your internet disconnects and reconnects, the problem usually lives in your home, not at your internet service provider's office. Your router broadcasts a radio signal — the same kind of signal that a baby monitor or microwave uses. If something is blocking that signal, moving too far from it, or broadcasting on the same frequency, your devices lose connection even though your internet line itself is still working fine.

The second most common cause is that your router is overheating or running out of memory from too many devices connected at once. A router that has been on for weeks without a restart, or one that is crammed into a hot cabinet, will start dropping connections randomly. The third cause is a problem with your internet service provider's equipment or line — but this is less common than people think, and you can usually rule it out in minutes.

Key Takeaways

  • Move your router to a central, open location away from microwaves, cordless phones, and thick walls, and keep it in open air rather than inside a cabinet or closet.
  • Restart your router by unplugging it for 30 seconds, then plugging it back in — this fixes roughly half of all disconnection problems.
  • Check how many devices are connected to your router; if you have more than 20 devices, your router may be overwhelmed and need replacement.
  • If disconnections happen at the same time each day or only when one device is in use, the problem is almost certainly in your home, not with your internet service.
  • Test your connection by plugging a computer directly into your modem with an ethernet cable; if it stays connected, your router is the problem.

Physical obstacles between you and your router

Your router sends out a radio signal in all directions, but walls, metal, and water absorb that signal. The farther you are from the router, the weaker the signal gets. If you are in a bedroom two rooms away from your router, or if your router is in a basement and you are on the second floor, you may be at the edge of the signal's range. When you move slightly, or when someone walks past, the signal can drop below the threshold your device needs to stay connected.

Thick walls — especially those with metal studs or plumbing — block the signal more than drywall alone. Concrete, brick, and tile are also strong blockers. If your router is in a closet, inside a cabinet, or behind a door, you are losing signal strength for no reason. Move it to an open shelf in a central room, away from walls if possible. Placing it higher up — on a shelf rather than on the floor — also helps the signal reach more of your home.

Interference from other devices on the same frequency

Most home routers broadcast on the 2.4 GHz frequency, which is the same frequency used by microwaves, cordless phones, baby monitors, and some older wireless speakers. When these devices are in use near your router, they create radio noise that drowns out your wifi signal. Your device may disconnect, reconnect, or slow down dramatically.

The 5 GHz frequency that newer routers offer has less interference because fewer devices use it, but it does not travel through walls as well as 2.4 GHz. If your router supports both frequencies, you can connect devices that are close to the router on 5 GHz and devices farther away on 2.4 GHz. Check your router's manual or the sticker on the back to see if it has a 5 GHz band. If you are using a cordless phone or baby monitor, move it away from your router or switch to a wired phone if possible.

Your router is overheating or running out of memory

A router is a small computer. Like any computer, it can overheat if it does not have airflow around it, and it can run out of memory if too many devices are connected or if it has been on for too long without restarting. When a router overheats, it may disconnect randomly or shut down entirely. When it runs out of memory, new devices cannot connect, or existing connections drop.

The fastest fix is to restart your router. Unplug it from power for 30 seconds, then plug it back in. Wait two to three minutes for it to fully boot up. This clears the router's memory and gives it a fresh start. If you are restarting your router more than once a month, the problem is likely that too many devices are connected, or the router itself is failing and may need replacement.

Check how many devices are connected to your router. Most home routers can handle 20 to 50 devices comfortably, but performance drops as you approach that limit. If you have smart lights, smart speakers, security cameras, phones, tablets, computers, and streaming devices all on the same network, you may be overloading it. Disconnect devices you are not using, or ask your internet service provider about upgrading to a newer router.

A problem with your modem or internet service provider's line

Your modem is the device that connects your home to your internet service provider's network. It sits between your router and the outside world. If your modem is failing or if the line coming into your home is damaged, you will lose internet entirely or experience frequent disconnections. However, this usually affects all devices at once, not just one.

To test whether the problem is your modem or your router, plug a computer directly into your modem using an ethernet cable. Bypass your router entirely. If the connection stays stable for an hour, your router is the problem. If the connection still drops, the problem is your modem or your internet service provider's line.

If you think your modem is the problem, restart it the same way you restart your router: unplug it for 30 seconds, then plug it back in. If disconnections continue, contact your internet service provider. They can run a line test from their office to see if the problem is on their side. Many providers will replace a failing modem for free.

Disconnections that happen at specific times or with specific devices

If your internet only disconnects when you are using a particular device — like your laptop but not your phone — the problem is almost certainly that device's wifi card, not your router or internet service. Try updating the device's wifi drivers (for Windows or Mac computers) or restarting the device. If the problem persists only with that one device, the wifi hardware in that device may be failing.

If disconnections happen at the same time every day — say, every evening at 6 p.m. — someone else in your home may be using a device that interferes with your router at that time. A microwave running during dinner, or a cordless phone being used, could be the culprit. Try turning off other devices one at a time to see if the disconnections stop.

When to contact your internet service provider

Contact your internet service provider if you have ruled out router problems and the disconnections affect all your devices at once. Have the following information ready: the time the disconnections started, whether they happen at specific times of day, and whether they happen in all rooms of your home or only some. If you have already restarted your modem and the problem continues, the provider can run diagnostics on their end.

Many internet service providers will send a technician to your home to check the line and modem for free, especially if your modem is provided by them. Some providers also offer a chat or phone support line that can walk you through troubleshooting steps. Ask whether your service plan includes a support line before you call.

Frequently Asked Questions

Why does my internet disconnect only when I am far from the router?

Your router's signal gets weaker the farther away you are. If you are at the edge of the signal's range, small movements or obstacles can push you below the connection threshold. Move the router to a more central location, or consider a mesh wifi system that uses multiple devices to cover your whole home.

Does restarting my router actually fix anything, or is it just a myth?

Restarting clears the router's memory and allows it to reconnect to your internet service provider's network. It fixes about half of all disconnection problems, especially if the router has been on for weeks. If restarting helps but the problem returns within days, something else is causing the disconnections.

Can my neighbors' wifi interfere with mine?

Yes, if you and your neighbors are all using 2.4 GHz on overlapping channels, you may experience interference. Most routers let you change the channel in the settings. Try channels 1, 6, or 11 on 2.4 GHz, as these do not overlap with each other. You can use a wifi analyzer app to see which channels your neighbors are using.

What is the difference between my modem and my router?

Your modem connects your home to your internet service provider's network and converts their signal into data your devices can use. Your router takes that data and broadcasts it as wifi so multiple devices can connect wirelessly. Some devices combine both functions into one box.

How do I know if my router is too old and needs replacing?

If your router is more than five years old, disconnects frequently even after restarting, or cannot handle the number of devices you have, it is probably time to replace it. Newer routers are faster, more reliable, and support more devices. Ask your internet service provider what routers they recommend for your service speed.