To reset a Dahua password using the serial number, you must obtain a temporary security code by emailing the number to Dahua support or your authorized distributor.
There is a massive misconception online. Many users look for a "Dahua password reset by serial number" because they think they can just hold down a button. dahua password reset by serial number
| Error | Cause | Solution | |-------|-------|----------| | “Serial number mismatch” | You entered the wrong S/N or device was tampered with | Re-check label; try scanning QR code on device. | | “Reset code invalid” | The generated code doesn’t match timestamp or device’s internal clock | Sync device time via NTP before reset attempt. | | “Security code expired” | Some devices generate a code valid for only 300 seconds | Repeat the process faster. | | “Email not registered” | No email was ever set in device | Must use serial + support ticket method. | | “Firmware too old” | Pre-2015 firmware may lock out permanently | Need physical reset or firmware reflash. | To reset a Dahua password using the serial