Epson Epson WorkForce WF-7820 All-in-One Wide-Format Wireless Color Inkjet Printer with Auto 2-Sided Print up to 13x19 PAPER-SIZE-ERR Error Fix: Paper Size Mismatch

Error code PAPER-SIZE-ERR on the Epson Epson WorkForce WF-7820 All-in-One Wide-Format Wireless Color Inkjet Printer with Auto 2-Sided Print up to 13x19 means: Paper Size Mismatch. The paper loaded in the tray does not match the paper size selected in the print settings — adjust the paper guides in the tray to match the loaded paper size, then update the paper size setting on the printer control panel and in the print driver; this error commonly occurs when switching between Letter and A4 or when using the rear feed slot

The most successful fix is "Reset Printer Firmware and Calibrate Paper Size Sensors" (medium difficulty, ~30 minutes). Estimated DIY cost: $0-$10. 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 Printer Firmware and Calibrate Paper Size Sensors") is rated medium difficulty and takes about 30 minutes. Tools needed: Small flathead screwdriver.

DIY cost: $0-$10. Professional repair typically costs $100-$140. Many homeowners save money by trying the top-ranked community fix first.

The Epson Epson WorkForce WF-7820 All-in-One Wide-Format Wireless Color Inkjet Printer with Auto 2-Sided Print up to 13x19 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 PAPER-SIZE-ERR 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-2850 All-in-One Wireless Color Supertank Printer with Scanner and Copier, 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. The fix may vary by model, so check each model's specific page for tailored repair steps.