Epson Epson EcoTank ET-2850 All-in-One Wireless Color Supertank Printer with Scanner and Copier W-12 Error Fix: Wi-Fi Security Key Mismatch

Error code W-12 on the Epson Epson EcoTank ET-2850 All-in-One Wireless Color Supertank Printer with Scanner and Copier means: Wi-Fi Security Key Mismatch. The Wi-Fi password entered on the printer does not match the router password — re-enter the Wi-Fi password carefully on the printer, noting that passwords are case-sensitive; if the router password was recently changed, update it on the printer through the Wi-Fi setup wizard

The most successful fix is "Reset Network Settings and Update Router Firmware" (medium difficulty, ~40 minutes). This fix costs nothing. HomeMD has 2 community-ranked fixes for this error.

This error is rated medium severity. It should be addressed soon, but your appliance may still function in a limited capacity.

Yes — the top-ranked community fix ("Reset Network Settings and Update Router Firmware") is rated medium difficulty and takes about 40 minutes. Tools needed: Computer with web browser, Printer control panel.

DIY cost: $0. Professional repair typically costs $100-$160. Many homeowners save money by trying the top-ranked community fix first.

The Epson Epson EcoTank ET-2850 All-in-One Wireless Color Supertank Printer with Scanner and Copier has 8 other known error codes, including: 0x69 (Print Head Overheated), 0x97 (Internal Hardware Error (Mainboard)), 0xEA (Paper Feed Error (Hardware)), 0xF1 (Ink System Error (Fatal)), ADF-JAM (Automatic Document Feeder Paper Jam), and 3 more.

Error code W-12 also appears on 5 other Epson models: Epson EcoTank ET-2800 All-in-One Wireless Color Cartridge-Free Supertank Printer with Scan and Copy, Epson EcoTank ET-4850 All-in-One Cartridge-Free Supertank Printer with Scanner, Copier, Fax, ADF, and Ethernet, Epson WorkForce Pro WF-4830 All-in-One Wireless Color Inkjet Printer with Auto 2-Sided Print and PrecisionCore, Epson WorkForce WF-2960 All-in-One Wireless Color Inkjet Printer with Scanner, Copier, Fax, and ADF, Epson WorkForce WF-7820 All-in-One Wide-Format Wireless Color Inkjet Printer with Auto 2-Sided Print up to 13x19. The fix may vary by model, so check each model's specific page for tailored repair steps.