How to Fix a Scanner Not Detected Over Wi-Fi at Home

Your printer may still print just fine, but the scanner suddenly disappears from your computer. If you're dealing with a scanner not detected over Wi-Fi, the problem is usually tied to network communication, scanner services, or outdated software rather than a broken device. In this guide, you'll learn the most effective steps to reconnect a wireless scanner on both Windows and Mac.

Why this happens

A scanner uses different software components and network services than basic printing. That means a multifunction printer can still print documents while scan functions fail because the computer cannot find the scan service, the device changed IP address, or the manufacturer software lost its connection.

Another common reason is that the scanner and computer are no longer on the same Wi-Fi network. This can happen after a router restart, internet provider equipment swap, guest network connection, VPN use, or automatic driver updates. When that happens, the scanner may appear offline, unavailable, or not show up at all in your scan app.

Fix it step by step

1. Confirm the scanner is connected to the same Wi-Fi network as your computer. On the printer or scanner display, open the wireless or network settings and verify the network name. Then check your Windows PC or Mac to make sure it is connected to that exact same Wi-Fi network, not a guest network or mobile hotspot. If your router has separate 2.4 GHz and 5 GHz bands, some older scanners work more reliably on 2.4 GHz.
2. Restart the scanner, computer, and router. Turn the scanner off, shut down your computer, and unplug your router for about 30 seconds. Power the router back on first, wait until Wi-Fi is fully restored, then turn on the scanner and computer. This refreshes device discovery and often resolves a scanner not showing up on network issues.
3. Open the manufacturer's scan app instead of relying on a generic app. On Windows, try the printer maker's scanning software before using Windows Scan. On Mac, try the brand's utility if Image Capture does not see the device. Manufacturer apps are more likely to detect the scanner correctly and may also prompt you to repair the wireless connection.
4. Remove and re-add the scanner or multifunction printer. On Windows, go to Settings > Bluetooth & devices > Printers & scanners, select the device, and remove it. Then choose Add device and let Windows search again. On Mac, go to System Settings > Printers & Scanners, remove the device, then add it again using the plus button. If the scanner does not appear automatically, look for an option to add it by IP address in the manufacturer's software.
5. Update or reinstall the full driver and scanner software package. A basic print driver may not include scanning support. Visit the official support page for your printer model and install the latest full-feature software for your version of Windows or macOS. After installation, restart the computer and test a scan. This is one of the most reliable fixes for scanner driver troubleshooting.
6. Check firewall or security software if the scanner was working before. Some security programs can block local network discovery. Temporarily allow the manufacturer's scanner software through the firewall and test again. If you are using a VPN, disconnect it briefly and retry the scan because some VPNs interfere with local device detection.
7. Assign the scanner a stable IP address from your router if the issue returns often. If the scanner works one day and disappears the next, the router may be giving it a different IP address. Log in to your router and create a DHCP reservation for the scanner so it keeps the same address. This helps when the scanner not detected over Wi-Fi problem keeps coming back after restarts or power outages.

If the problem keeps coming back

Intermittent scan failures usually point to unstable Wi-Fi, aggressive security software, or incomplete driver packages. If your scanner repeatedly drops off the network, move it closer to the router, keep the firmware and driver updated, and use the full manufacturer utility rather than a generic scan app. If you want hands-on help diagnosing the connection, 247TechTeam can walk you through the process remotely.

Frequently asked questions

Why does my printer work but the scanner does not?

Printing and scanning use different services and software. Your computer may still send print jobs successfully while the scan utility cannot discover the scanner on the network or access the correct driver.

How do I find my scanner's IP address?

You can usually view it from the printer or scanner network menu, a wireless status screen, or a printed network configuration page. Some routers also show connected devices and their IP addresses in the admin panel.

Should I use a USB cable if Wi-Fi scanning keeps failing?

Yes, a USB connection is a good test. If scanning works over USB, the scanner hardware is probably fine and the issue is most likely with Wi-Fi discovery, router settings, or the network driver setup.

If you would like expert help getting your scanner connected again, call 247TechTeam at 888-549-0702 or request a secure remote session.