[GET HELP] Support Code 21400 (Scanning failure)

<h1>[GET HELP] Support Code 21400 (Scanning failure) –</h1> Canon Inc. printer billing & device sync issues (2026) 📞 Billing & Technical Sync Line: +1-855-508-8955 Department: Subscription Recovery & Hardware Authorization Priority: High-level scan recovery, account sync & device support (CA & TX users) <h2>Why is my Canon printer showing Support Code 21400 (Scanning failure)?</h2> If your Canon printer or scanner is linked to a connected service or cloud account, Support Code 21400 (Scanning failure) can appear when background authorization or device-service synchronization fails. In 2026, this is most commonly caused by: <ul> <li style="font-weight: 400;">Online verification failure The printer or scanner has not connected to Canon service servers for more than 24 hours to validate device and account status. </li> <li style="font-weight: 400;">Account or billing update not synced Your payment or account information was changed, but the device is still using an older authorization token, causing the scanner service to fail and display Support Code 21400 (Scanning failure). </li> <li style="font-weight: 400;">Firmware or driver communication lock A recent 2026 firmware or driver update can interrupt the scan-service handshake and trigger Support Code 21400 (Scanning failure). </li> </ul> <h2>🛠️ Fixing Support Code 21400 (Scanning failure) on a Canon printer</h2> Use the steps below when scanning stops working and the device shows Support Code 21400 (Scanning failure). <ul> <li style="font-weight: 400;">Power refresh </li> <ul> <li style="font-weight: 400;">Keep the printer switched ON. </li> <li style="font-weight: 400;">Remove the power cable from the printer. </li> <li style="font-weight: 400;">Remove the other end from the wall outlet. </li> <li style="font-weight: 400;">Wait 60 seconds, then reconnect. </li> </ul> <li style="font-weight: 400;">Control-panel recovery start (Canon models with keypad) </li> <ul> <li style="font-weight: 400;">Power the printer on. </li> <li style="font-weight: 400;">Press and hold Stop/Cancel and Black (or OK, depending on the model). </li> <li style="font-weight: 400;">Release when the display or logo appears. This clears cached service and scan-authorization data that can cause Support Code 21400 (Scanning failure). </li> </ul> <li style="font-weight: 400;">Manual port configuration (Windows) </li> <ul> <li style="font-weight: 400;">If scanning still fails: </li> <ul> <li style="font-weight: 400;">Open Printer Properties > Ports </li> <li style="font-weight: 400;">Disable any WSD or Web Services ports </li> <li style="font-weight: 400;">Add a Standard TCP/IP Port </li> <li style="font-weight: 400;">Enter the printer’s current IP address </li> </ul> </ul> </ul> <h2>🛡️ 2026 Canon connected-service refund & cancellation rules</h2> (when Support Code 21400 (Scanning failure) is related to service or sync problems) <ul> <li style="font-weight: 400;">Connected service behavior </li> <ul> <li style="font-weight: 400;">After cancellation: </li> <ul> <li style="font-weight: 400;">background monitoring stops immediately </li> <li style="font-weight: 400;">scanning and printing remain available locally </li> <li style="font-weight: 400;">automatic supply delivery is disabled. </li> </ul> </ul> <li style="font-weight: 400;">15-day notice protection </li> <ul> <li style="font-weight: 400;">If you were charged without a clear 15-day renewal notice in Texas, or </li> <li style="font-weight: 400;">the cancellation option was hidden or difficult to access in California, you may qualify for a priority refund when reporting Support Code 21400 (Scanning failure). </li> </ul> <li style="font-weight: 400;">Service credit eligibility </li> <ul> <li style="font-weight: 400;">If your Canon printer or scanner remained unusable for more than 48 hours because of a verified server or firmware issue linked to Support Code 21400 (Scanning failure), you may be eligible for a partial service credit. </li> </ul> </ul> <h2>🛠️ Canon priority resolution desk – Support Code 21400 (Scanning failure)</h2> 📞 Canon support & billing hotline: +1-855-508-8955 Use this number to: <ul> <li style="font-weight: 400;">Restore scan authorization </li> <ul> <li style="font-weight: 400;">Guided recovery when your Canon device shows Support Code 21400 (Scanning failure). </li> </ul> <li style="font-weight: 400;">Request billing refunds </li> <ul> <li style="font-weight: 400;">For duplicate or unrecognized connected-service charges. </li> </ul> <li style="font-weight: 400;">Force account and device re-sync </li> <ul> <li style="font-weight: 400;">If your printer or scanner does not recognize updated account or payment details. </li> </ul> <li style="font-weight: 400;">Cancel connected services safely </li> <ul> <li style="font-weight: 400;">Assistance with stopping auto-delivery while keeping local scan and print functions active. </li> </ul> </ul> <h2>2026 state-specific notice – Canon Support Code 21400 (Scanning failure)</h2> <ul> <li style="font-weight: 400;">Users in California and Texas are reporting a recurring subscription and scan-service sync deadlock that appears together with Support Code 21400 (Scanning failure). </li> <li style="font-weight: 400;">This is commonly linked to a V3-token synchronization failure on new high-speed fiber networks in cities such as Austin and Los Angeles. </li> <li style="font-weight: 400;">The device may continue to show Support Code 21400 (Scanning failure) even after account status and payments are confirmed. </li> </ul> Under the 2026 updates to California’s Automatic Renewal Law (ARL) and Texas HB 2859, you may be entitled to a refund if: <ul> <li style="font-weight: 400;">the cancellation process related to Support Code 21400 (Scanning failure) was made unreasonably difficult, or </li> </ul> a clear 15-day pre-renewal notice was not provided.