You refilled the ink tanks on your Epson EcoTank ET-4850, sent a page to print, and now you are staring at a message that looks like the printer no longer recognizes its ink. If you searched for a "cartridge not recognized" fix, here is the first thing worth knowing: this printer has no cartridges to recognize. The ET-4850 (model C11CJ60202) is a cartridge-free Supertank all-in-one, so the ink lives in high-capacity refillable tanks that you top up from EcoFit ink bottles, not in plug-in cartridges.
What you are almost certainly hitting instead is the "Reset Ink Levels" message that appears after a refill, or a separate print or Wi-Fi snag that stalled the job. Both are easy to clear once you know the right path. The fixes below run from the safest, quickest checks to the official reset and support route, so start at the top and stop as soon as your printer is working again.
Why There Is No Cartridge to Reseat on This Printer
The ET-4850 is an EcoTank Supertank, which means there is nothing to pop out, wipe down, or click back into place. If a guide tells you to clean cartridge contacts or reseat a cartridge, that advice is for a different style of printer and does not apply here.
When print quality drops or the printer reports low ink, the answer is to refill the tanks rather than swap a part. Open the scanner unit and the ink tank cover, then refill each color tank to the top line using the EcoFit ink bottles. The bottles are color-coded, so match each bottle to the tank of the same color to avoid mixing inks.
One safety rule matters above all: never let the ink fall below the lower line on any tank, because running a tank dry can damage the printer. Topping up before you reach that point keeps the print head healthy and avoids most of the "something is wrong with my ink" panics that lead people here.
Clearing the Reset Ink Levels Message After a Refill
This message is the EcoTank equivalent of a recognition error, and it is completely normal after you refill. The printer cannot measure tank levels directly; it estimates how much ink remains by internal monitoring, so after you top up you have to tell it the tanks are full again.
- 1.Refill all tanks (or just the ones shown on the LCD) all the way to the top line.
- 2.Select the colors you refilled on the LCD screen.
- 3.Press the start button.
- 4.Follow the on-screen instructions to reset the ink levels.
Do not be thrown if this reset message appears even when ink is clearly still present in a tank. Because the printer is estimating rather than measuring, that prompt can show up while ink remains, and confirming the reset simply realigns its internal count with reality.
Power-Cycle the Printer and Flush a Stuck Print Job
A hung job or a jammed queue is one of the most common reasons a page never prints, and it can masquerade as an ink or hardware fault. Start by turning the printer off and then on again to clear any temporary glitch in its memory.
Next, delete any stuck jobs on your computer. On Windows, go to Control Panel > Hardware and Sound > Devices and Printers, right-click your product, and choose 'See what's printing'. Right-click the stalled job, click Cancel, then click Yes to confirm.
With the queue empty, send a fresh test page. If the previous job had simply jammed the line, the new one should now go through without touching anything else.
Take the Printer Off Use Printer Offline on Windows
If prints still are not going through on a Windows PC, the printer may have been flagged as offline. Open the Epson print queue, select 'Printer' from the menu, and deselect the 'Use Printer Offline' checkbox so the system treats the printer as available again.
Should it still fail after that, glance at the printer's Wi-Fi indicator. If it shows as connected, unplug your router for a moment, plug it back in, wait for it to come back up, and try the print again, then restart the computer for good measure.
Reset the Printing System and Re-Add the Printer on a Mac
Mac users have an equivalent fix that rebuilds the printer's entry from scratch, which clears out a corrupted or confused setup. First, if the offline flag is set, open the Epson print queue, select 'Printer', and deselect the 'Use Printer Offline' checkbox.
- 1.Open the Apple menu > System Preferences or System Settings > Printers & Scanners (it may be labeled Print & Scan or Print & Fax on your version of macOS).
- 2.Select the printer and click the minus (-) button to remove it.
- 3.Click the plus (+) button.
- 4.Select your printer with Kind set as Bonjour.
- 5.Choose it from the Use list, then click Add.
Once the printer is added back as a Bonjour device, send a test page. Re-adding it this way resolves a surprising number of stubborn print failures on macOS.
Get the Wi-Fi Connection Back on the 2.4 GHz Band
The ET-4850 connects over 2.4 GHz Wi-Fi, so a connection problem is often really a band problem. Keep the printer within range of a 2.4 GHz router, and confirm you selected the correct SSID and entered the right password during setup.
If you have a 5 GHz router, set it to dual-band (2.4 GHz and 5 GHz) mode so the 2.4 GHz band is available for the printer to join. When the router broadcasts a single combined SSID for both bands, give each band its own name, for example 'Home Network 2.4 GHz' and 'Home Network 5 GHz', so the printer can clearly find and join the 2.4 GHz network.
This separation also makes it obvious which network you are pointing the printer at, which removes a lot of guesswork when a phone or computer happens to be sitting on the 5 GHz band.
Update the Firmware and Reinstall the Driver
Outdated firmware or a damaged driver can cause printing and recognition oddities, and Epson Software Updater handles the firmware side cleanly. On Windows, go to Start > Epson Software > Epson Software Updater, select your printer, check 'Firmware Updater', click 'Install item(s)', accept the agreement, click 'Start', then 'Finish'.
On macOS, open Applications > Epson Software > Epson Software Updater, check the firmware update box, click 'Install', click 'Agree', then 'Start' and 'Finish'. Keeping the firmware current resolves behavior that older builds may have mishandled.
If problems persist after updating, do a clean driver reinstall. Uninstall the existing software, temporarily disable the firewall, restart the router, then download and reinstall the printer driver and software from the ET-4850 support page. To disable the firewall on Windows 11, go to Settings > Network & Internet > Advanced network settings > Windows Firewall; on Windows 10, Settings > Network & Internet > Windows Firewall; and on Windows 8.x or other versions, Control Panel > Windows Firewall. Re-enable the firewall once the reinstall finishes.
Restore Default Settings, Then Reach Epson
When nothing above clears the problem, restoring defaults gives the printer a clean slate from its own control panel. Press the home button if necessary, then select Settings > Restore Default Settings.
From there, choose the scope that matches your problem. Select Network Settings to clear only the network configuration if this is a connection issue, or pick Copy Settings, Scan Settings, or Fax Settings for those specific areas. The Clear All Data and Settings option erases everything, including your Wi-Fi setup, fax entries, and saved preferences, so use it only as a last resort and be ready to set the printer up again afterward. Select Yes to confirm your choice.
If the issue still continues after a restore, it is time to escalate. Use the ET-4850 support page, which offers downloads, guided assistance, and contact options so you can hand the problem to Epson directly.
Frequently Asked Questions
Does the Epson EcoTank ET-4850 use ink cartridges?
No. The ET-4850 is a cartridge-free EcoTank Supertank printer with high-capacity refillable tanks that you fill from EcoFit ink bottles. Because there are no cartridges, a "cartridge not recognized" error cannot occur on this model; the closest equivalent is the "Reset Ink Levels" message after a refill.
Why does the printer ask me to reset ink levels when there is still ink in the tank?
The printer estimates how much ink remains through internal monitoring rather than measuring the tanks directly, so the reset prompt can appear even when ink is still present. Confirm the reset after topping up the tanks so the printer's internal count matches the actual fill level.
What Wi-Fi band does the ET-4850 need?
It connects over 2.4 GHz Wi-Fi. If you use a 5 GHz router, set it to dual-band mode, and if it broadcasts one combined SSID, give each band a separate name (such as 'Home Network 2.4 GHz' and 'Home Network 5 GHz') so the printer can join the 2.4 GHz band.
How do I update the printer's firmware?
Use Epson Software Updater. On Windows, go to Start > Epson Software > Epson Software Updater, check 'Firmware Updater', click 'Install item(s)', accept, click 'Start', then 'Finish'. On macOS, open Applications > Epson Software > Epson Software Updater, check the firmware update box, click 'Install', click 'Agree', then 'Start' and 'Finish'.
Can I print from my phone without a computer?
Yes. The ET-4850 supports the Epson Smart Panel app (iOS 11.0 or later, iPadOS 13.1 or later, Android 5.0 or later) for setup, printing, scanning, and supply ordering. It also supports Apple AirPrint and the Mopria Print Service and Mopria Scan on the same network.
