Home Internet & Connectivity How to Use Your Old Router as a Wi-Fi Extender

How to Use Your Old Router as a Wi-Fi Extender

May 25, 2026

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You can use an old router as a Wi-Fi extender in two main ways: connect it to your main router with an Ethernet cable and configure it as an access point, or use wireless repeater mode if the old router supports it.

A wired access point generally provides a more reliable connection because Ethernet carries data between the routers. Wireless repeater mode avoids running a cable but depends on signal strength, hardware compatibility and interference.

For manual wired configuration, you may need to assign the old router an unused management IP address and disable its DHCP server. However, the exact steps depend on your router model. If it lacks the required features or cannot be configured securely, a dedicated Wi-Fi extender may be a better option.

Which Method Should You Use?

Your situation	Recommended method
You can connect both routers using Ethernet.	Wired access point mode
You cannot run Ethernet, but the old router supports wireless repeating.	Wireless repeater mode
Your router supports neither option.	Compatible Wi-Fi extender or mesh system

Why Your Wi-Fi Has Dead Zones

Weak Wi-Fi in a bedroom, upstairs office or distant corner does not necessarily mean your broadband connection is slow. Your internet service may be working correctly while the wireless signal struggles to reach certain rooms.

Common causes include:

Distance: Wi-Fi signals generally weaken as they travel farther from the router.
Walls and floors: Dense building materials can reduce signal strength.
Interference: Nearby wireless networks and other radio sources can affect performance.
Poor router placement: A router hidden inside a cabinet or placed near the floor may provide limited coverage.
Older hardware: An old router may support lower wireless speeds or lack features available on newer devices.

An old router can provide another wireless access point closer to the area where you need coverage. However, it does not increase the speed supplied by your broadband provider, and the improvement depends on its capabilities and how it connects to your main router.

Check Whether You Have a Wi-Fi Coverage Problem

Before configuring an old router, check whether weak wireless coverage is actually causing the problem. Adding another access point may help with poor coverage, but it will not necessarily fix a slow broadband connection.

Run a speed test beside your main router, then repeat it in the room where Wi-Fi performs poorly. Use the same device and speed-test service, and pause large downloads where possible.

Fast beside the main router but slow in one room: Distance, walls, interference or poor coverage may be contributing to the problem. An additional access point could help.
Slow beside the main router and in the distant room: Investigate the main router, broadband connection, device or testing conditions before spending time extending Wi-Fi.
Only one device is affected: Check that device’s Wi-Fi capabilities, software and network settings before changing the entire network.

These comparisons help narrow down the likely cause, although speed tests alone cannot identify every network fault. If the connection remains slow near the main router, investigate the underlying connection before assuming that Wi-Fi coverage is responsible.

Before You Start: Check Your Old Router

Find the manufacturer’s name and model number on the label underneath or behind the router. Check the official manual to determine whether it supports:

Access point (AP) mode.
Wireless repeater or range extender mode.
Wireless bridge or WDS mode, where applicable.
Firmware updates and suitable Wi-Fi security settings.

These modes are not interchangeable. Access point mode normally uses Ethernet to connect to the main router, while repeater mode connects wirelessly. The available options depend on the router model and firmware.

You will also need the main Wi-Fi name and password, access to the old router’s administration page, its power adapter and an Ethernet cable for the wired method.

Check Your Router’s Security

Before connecting an old router to your network, check whether its firmware is still supported and install available manufacturer updates. Change the default administrator password to a strong, unique password.

Configure Wi-Fi security using the strongest mode supported by both routers and your connected devices. Check the documentation for your specific models rather than assuming an older router supports modern security standards. Do not weaken your main network’s security simply to make an incompatible device connect.

If the old router only supports obsolete security protocols, no longer receives security updates or cannot be configured securely, replacing it with a supported access point or Wi-Fi extender may be safer.

Method 1: Use Your Old Router as a Wired Access Point

This is generally the best option if you can run an Ethernet cable between your main router and the area needing better coverage. The cable carries network traffic to the old router, which then provides Wi-Fi to nearby devices.

Step 1: Reset the Old Router if Necessary

If the router contains settings from a previous network, a factory reset can provide a clean starting point.

Follow the manufacturer’s reset instructions. Some routers have a recessed reset button, but the required press duration varies. A reset usually erases custom settings, including Wi-Fi credentials and administrator settings, so make sure you are prepared to configure it again.

If you can already access the administration page and understand the existing settings, a reset may not be necessary.

Step 2: Open the Router’s Settings Page

Connect a computer or phone to the old router using Wi-Fi or Ethernet. Open a browser and enter its management address.

Common addresses include 192.168.0.1 and 192.168.1.1, but the correct address depends on the model. Check the router label or manual if neither works.

Sign in using the administrator credentials. Remember that the administrator password may differ from the Wi-Fi password.

If you need help with router access or credentials, read our guide to router resets and Wi-Fi password problems.

Step 3: Enable Access Point Mode

Look for a menu labelled Operation Mode, Working Mode or Network Mode. If Access Point mode is available, select it and follow the setup wizard.

The router may restart or change its management IP address during setup. This is normal on some models. Keep the main router’s DHCP service enabled so it can assign IP addresses to devices across your network.

If there is no Access Point option, consult the manufacturer’s instructions before attempting manual configuration.

For examples, see the ASUS router operating modes guide and the ASUS access point setup guide.

Step 4: Configure the Old Router Manually if Supported

Some routers can operate as basic wired access points without a dedicated AP mode. However, manual configuration varies by model, so check the manufacturer’s instructions before changing network settings.

Before you begin, record the old router’s current network settings, including its management IP address, subnet mask and DHCP configuration. You may need these details to restore access if the new settings do not work.

For a compatible router, the usual process is to:

Find the main router’s local IP address, subnet mask and DHCP address range.
Choose an unused management IP address that belongs to the same local subnet as the main router and does not conflict with another device.
Configure the old router’s Wi-Fi name, password and compatible security settings.
Disable the old router’s DHCP server so it does not compete with the main router.
Save the settings and restart the device if required.

For example, suppose the main router uses 192.168.2.1, has a subnet mask of 255.255.255.0 and assigns addresses from 192.168.2.100 to 192.168.2.199. An address such as 192.168.2.11 could be suitable for the old router’s management address if it is unused and the network settings are compatible.

This example is illustrative, not universal. Your network may use a different address range or subnet mask. An incorrect management IP address or subnet configuration can make the old router’s administration page temporarily inaccessible.

If your main router supports DHCP reservations, you may be able to reserve an address for the old router’s network interface. A reservation associates an IP address with a device’s MAC address. Follow the manufacturer’s instructions to avoid address conflicts.

For a model-specific example, consult TP-Link’s access point setup guide.

Step 5: Connect Both Routers

Connect an Ethernet cable from a LAN port on the main router to the appropriate port on the old router, following its manual.

A typical manually configured access point uses a LAN-to-LAN connection. Some routers in dedicated Access Point mode use the WAN port instead, so check the manufacturer’s instructions rather than assuming one connection method works for every model.

Power on both routers, connect your phone or laptop to the old router’s Wi-Fi and test internet access.

If the device connects but cannot browse, see our guide to fixing Wi-Fi that says connected but has no internet.

Method 2: Use Your Old Router as a Wireless Repeater

If running an Ethernet cable is impractical, wireless repeater mode may be suitable. The old router connects to your existing Wi-Fi network and retransmits the connection to nearby devices.

However, the router must support repeater or compatible wireless extension mode. A router that only supports wired access point mode generally cannot perform this setup by itself.

Step 1: Find Repeater Mode

Sign in to the old router and look for Repeater Mode, Range Extender, Wireless Bridge or WDS. The names and capabilities vary by manufacturer.

If the option is missing, check the official manual for your exact model. Do not select Media Bridge automatically: on some routers, this mode connects wired devices to a wireless network without rebroadcasting Wi-Fi for other devices.

Step 2: Select Your Main Wi-Fi Network

Use the setup wizard to scan for nearby networks. Select your main router’s Wi-Fi name and enter its password.

If prompted to choose a band, select one supported by both devices. A 2.4 GHz connection may reach farther in some environments, while 5 GHz can provide higher speeds when the signal is strong. Actual performance depends on hardware, interference and building layout.

Some routers let you use the same Wi-Fi name as the main network or create a separate name. A shared name may be convenient, but it does not guarantee that devices will always switch to the strongest access point.

Step 3: Save and Test the Connection

Save the configuration and wait for the router to restart. Check its connection indicator if available, then connect a phone or laptop to the extended network.

If setup fails, confirm that the password is correct, the selected network is compatible and the router supports the required mode. Also check whether its security settings are compatible with your main router.

For a manufacturer example, consult the TP-Link range extender mode guide and confirm that its instructions apply to your device.

Understand Wireless Repeater Speed Limitations

A wireless repeater must communicate with the main router while serving connected devices. On many conventional designs, these tasks share wireless airtime, potentially reducing throughput compared with a wired access point.

The actual impact depends on the router design, Wi-Fi bands, signal quality, interference and network traffic. Place the repeater where it receives a strong signal from the main router rather than at the edge of the dead zone.

Where Should You Place the Old Router?

For wireless repeater mode, avoid placing the old router directly in the room where the signal is already unusable. It needs a reasonably strong connection to the main router before it can retransmit the signal effectively.

Try positioning it between the main router and the weak-signal room, preferably in an open area away from large obstructions. Test different positions because walls and interference can affect results.

A wired access point offers more flexibility because Ethernet carries the connection to the old router. Place it in or near the area needing coverage, with suitable power and ventilation.

How to Test Whether the Setup Works

After configuration, test the connection in the room that previously had poor Wi-Fi.

Connect your phone or laptop to the new access point or extended network.
Open several websites to confirm internet access.
Run a speed test in the same room before and after setup, if you have a baseline.
Check whether video calls, streaming and browsing are more stable.
Repeat the tests at different times if performance varies.

Worked Example: Compare Speeds Before and After

Suppose your laptop gets 85 Mbps beside the main router but only 12 Mbps in the bedroom. This difference suggests that distance, walls or interference may be affecting the connection, although it does not prove the exact cause.

After configuring the old router, repeat the test in the bedroom using the same laptop and, as far as possible, the same testing conditions.

Bedroom speed improves substantially: The additional access point may be helping overcome the coverage problem.
Bedroom speed remains low, but the main-router connection is fast: Check placement, the wireless link, Ethernet connection and device compatibility.
Both locations produce similarly poor results: Investigate the main router, broadband connection, testing device or temporary network congestion.
Only one device performs poorly: Check that device’s Wi-Fi capabilities, software and network settings.

For a fair comparison, pause large downloads and use the same speed-test service. Record results before and after setup. If coverage improves but the connection still feels slow, read our guide to broadband contract speeds and actual performance.

Remember that a speed test is only a snapshot. Results vary with the testing server, device, Wi-Fi conditions and network activity. An additional router can improve coverage but cannot fix every broadband or provider-side problem.

Troubleshooting Common Old Router Extender Problems

Problem	What to check
Devices connect but have no internet	Check the Ethernet connection, repeater link and main router’s internet access.
Devices cannot obtain an IP address	For a manual wired access point, confirm DHCP is enabled on the main router and disabled on the old router.
You cannot reopen the old router’s settings	Reconnect your device to the correct Wi-Fi network or Ethernet connection. Check the main router’s connected-device list or DHCP leases, where available, to identify the old router’s current IP address. Consult the old router’s manual for its management address and connection procedure. If you still cannot regain access, a factory reset may be a last resort, but it will erase the router’s configuration and require you to set it up again.
Extended Wi-Fi is still weak	Improve placement and, for wireless repeating, find a position with a stronger signal from the main router.
Wi-Fi works but speeds are lower	Check the router’s Wi-Fi standard, band, signal strength and connection method.
The repeater cannot find the main network	Check band compatibility, security settings, wireless range and repeater support.

If every device in your home has slow internet, the issue may be broader than Wi-Fi coverage. Sky customers can also consult our guide to troubleshooting slow Sky Broadband speeds if that is their provider.

Frequently Asked Questions

Can any old router be used as a Wi-Fi extender?

No. It needs to support a suitable operating mode. A router with access point mode can usually extend coverage over Ethernet, while wireless extension requires compatible repeater or bridge functionality.

Do I need to disable DHCP on my old router?

For many manual wired access point setups, yes. The main router should normally assign IP addresses. With built-in AP or repeater modes, follow the manufacturer’s instructions rather than changing DHCP settings unnecessarily.

Should both routers have the same Wi-Fi name and password?

They can use the same name and password if their security settings are compatible, but this does not guarantee seamless roaming. Separate names can make it easier to identify which access point your device is using during testing.

Will an old router make my internet faster?

Not necessarily. It may improve Wi-Fi coverage in a weak-signal area, improving performance there. However, the router’s capabilities, interference, connection method and broadband speed can limit results.

Is Ethernet better than wireless repeater mode?

A wired access point is generally more reliable because Ethernet carries traffic between routers. Wireless repeating is useful when running a cable is impractical, but its performance depends on signal strength and hardware.

What should I do if I cannot access the old router after changing its IP address?

Reconnect your device to the correct network, then check the main router’s connected-device list or DHCP leases if available. Consult the old router’s manual for its management address and recovery instructions. A factory reset is a last resort because it erases the configuration.

Official Resources for Router Setup

Use the guide that matches your router brand and model:

These resources explain why the correct setup depends on the hardware and operating mode. Always confirm that the instructions apply to your exact router model and firmware.

Final Thoughts

Reusing an old router can be a practical way to improve Wi-Fi coverage without immediately buying a dedicated extender or mesh system. If Ethernet is available, check whether the old router supports Access Point mode. If you cannot run a cable, look for compatible repeater functionality before attempting a wireless setup.

Configure the device carefully, record its original settings before manual changes, choose compatible security settings and test the connection in rooms that previously had weak Wi-Fi. If you lose access to the administration page, check the router’s current management address and consult its manual before considering a factory reset.

If the router does not support the required mode, cannot be secured adequately or no longer receives security updates, a compatible dedicated extender may be the better option.

The goal is not simply to add another Wi-Fi signal. It is to create a reliable connection that helps you work, stream and browse comfortably throughout your home.