If your printer works on your phone but not your computer after a router change, the printer itself is probably not broken. The working device proves that at least one printing path still functions. The next step is to find out how that device is reaching the printer and why the other device is using a different or outdated connection.
This commonly happens after replacing a modem or router because phones, computers and printer applications do not all connect to a printer in the same way. A phone may be using the manufacturer’s app, AirPrint, Mopria, Wi-Fi Direct or even a cloud service. Meanwhile, the computer may still be sending print jobs to an old printer queue created for the previous network.
Use the working device as a diagnostic control
A device that can still print gives you something useful to compare against. Instead of resetting everything immediately, check what is different between the working and non-working devices.
The most important question is not simply whether the phone or computer can print. It is how that device is printing.
- π± Manufacturer application: Apps from HP, Canon, Epson, Brother and other manufacturers may discover the printer independently of the normal Windows or Mac printer queue.
- π AirPrint: An iPhone, iPad or Mac may locate the printer through Bonjour or mDNS local-network discovery.
- π€ Mopria or Android printing: An Android phone may use a built-in print service or manufacturer plugin.
- πΆ Wi-Fi Direct: The device may be connected directly to the printer rather than reaching it through the new router.
- βοΈ Cloud printing: Some printer apps can send jobs through an internet account, even when local printer discovery is not working.
- π¨οΈ Correctly rediscovered printer: The working computer may already have found the printer at its new network address while the other computer still has the old installation.
These methods can produce the same printed page, but they prove different things. A successful print from a manufacturer’s phone app does not necessarily prove that Windows can discover the printer across the local network.
Check whether both devices are using the same network
After a router change, two nearby devices can appear to have working Wi-Fi while actually being on different networks.
Compare the Wi-Fi network name shown on the working device, the non-working device and the printer. Look carefully for guest networks, older saved network names, extender networks or secondary routers.
- π The phone may be connected to the main home Wi-Fi while the computer is connected to a guest network.
- π One device may be connected through a mesh node, extender or secondary router that separates local devices.
- π‘ The printer may have reconnected to the new router while the computer remains connected to an older access point.
- π² A phone may have switched to mobile data while its printer application sends the job through a cloud account.
- π« Guest Wi-Fi or client-isolation settings may allow internet access while blocking communication with printers and other local devices.
Do not assume that matching signal bars mean the devices share the same local network. The exact Wi-Fi name and the route through the network matter.
The computer may still have the printer from the old router
A router replacement often gives the printer a different local IP address. The printer remains operational, but an existing Windows or Mac queue may continue sending jobs to the address it used before the change.
This explains why the printer can work from a phone that has recently rediscovered it while a computer reports it as unavailable.
The obsolete computer connection may involve:
- π’ An old Standard TCP/IP port pointing to the printer’s previous address.
- π A stale Windows WSD printer entry that is no longer discovering the correct device.
- π§ A cached Bonjour or printer-hostname record on a Mac.
- π Duplicate printer queues, with the wrong copy still selected as the default.
- βΈοΈ A queue that has been paused or placed into an offline state after repeated failed jobs.
If the printer is already installed but consistently appears unavailable, follow the separate guide for a printer that shows offline after a router change. That problem is usually about the installed queue or network address rather than basic discovery.
Why a phone can find the printer when Windows cannot
A phone application may search for the printer using the manufacturer’s own discovery process. Windows may instead depend on network discovery, WSD, a printer driver or a previously installed port.
Windows discovery can fail on one computer because:
- 𧱠The current Wi-Fi connection is classified as a Public network rather than a Private network.
- π‘οΈ Windows Firewall or security software is blocking local network discovery.
- π The printer queue is attached to an obsolete WSD or TCP/IP port.
- πΎ The installed driver is damaged, incomplete or no longer matched to the correct printer connection.
- π€ The printer was installed only for another Windows user account.
When Windows cannot see the printer at all, the next diagnostic path is the guide for a printer connected to Wi-Fi that the computer cannot find. It covers local discovery, network isolation and firewall permissions in more detail.
Why a printer can work from a Mac but not Windows
A Mac may automatically create an AirPrint connection using Bonjour, while Windows may require a manufacturer driver, a correctly detected WSD device or a direct TCP/IP installation.
The Mac working does not mean the Windows installation is correct. It only shows that the printer is reachable through the method used by macOS.
Common Windows-only faults include an old port, a duplicate queue, the wrong model driver or blocked network discovery. Conversely, a Windows computer may print successfully through a direct IP connection while a Mac cannot discover the same printer through AirPrint.
Comparing the printer name, connection type and network address on both computers can reveal whether they are actually using the same path.
Check for Wi-Fi Direct before changing the router
Wi-Fi Direct allows a phone, tablet or computer to connect directly to a printer’s own wireless network. It can make the printer appear to work even when the printer is not properly connected to the household router.
On the working device, check whether the current Wi-Fi name resembles the printer model, includes words such as DIRECT or begins with a manufacturer abbreviation.
If it does, the device may temporarily disconnect from the internet whenever it connects to the printer. Other household devices will not automatically gain access through that connection.
For normal shared printing, the printer and the household devices should usually connect through the same main router network rather than relying on separate Wi-Fi Direct sessions.
Compare the working and failing devices in this order
A structured comparison is usually faster than repeatedly reinstalling software.
- 1οΈβ£ Confirm the printing method: Determine whether the working device uses a mobile app, AirPrint, Mopria, Wi-Fi Direct, cloud printing or a normal installed printer.
- 2οΈβ£ Compare Wi-Fi networks: Check the exact network name on the printer and both devices.
- 3οΈβ£ Check the printer address: View or print the printer’s network status page and compare its current address with the computer’s installed port.
- 4οΈβ£ Inspect the failing queue: Look for offline status, paused jobs, duplicate entries or a queue created before the router change.
- 5οΈβ£ Test local discovery: Check network profile, firewall permissions and whether the computer can rediscover the printer.
- 6οΈβ£ Reinstall only what is necessary: Remove the obsolete connection and add the printer again using the correct local network path.
This process preserves the working setup while using it to identify what is missing from the failed device.
Do not replace the printer just because one device fails
When a printer produces a normal page from at least one device, its printing hardware, ink system and basic network functions are probably operational.
The failing device may still need a separate repair. Printer connections are stored independently on each Windows PC, Mac, phone and tablet. Reconnecting the printer to the router does not automatically repair every old queue or update every device with the printer’s new address.
A factory reset of the printer is also rarely the best first step. It may destroy the one working connection without fixing the stale queue, wrong network or firewall problem on the other device.
PcRiot can restore the printer across every device
PcRiot can compare the working and non-working devices, identify the connection method each one is using and correct the parts that no longer match the new router.
This may involve reconnecting the printer to the correct home network, removing obsolete Windows or Mac queues, installing the appropriate driver, correcting firewall or discovery settings and confirming that phones, tablets and computers can all reach the same printer.
For help setting up a printer on every device after a modem or router change, PcRiot provides onsite printer and computer help across Perth.