Anycubic error 10801 (Firmware Download Failed) appears on the Kobra 3, Kobra 3 Combo, Kobra S1, and Kobra S1 Combo when an over-the-air (OTA) firmware update is initiated through the Anycubic app or the printer touchscreen but the download does not complete successfully. The printer retains its current firmware version and continues to function — the update simply did not install.

What the Error Means

OTA firmware updates download a firmware image file from Anycubic’s servers to internal storage on the printer before flashing. Error 10801 fires when the download phase fails, not the flash phase — meaning the file never fully arrived. The most common causes are an unstable or slow Wi-Fi connection that drops packets during the transfer, a server timeout on Anycubic’s end, or insufficient free storage space on the printer’s internal memory. The printer’s current firmware is untouched, so you can continue printing while you resolve the issue.

Step-by-Step Fix

1. Check that the printer is connected to your Wi-Fi network. Go to Settings > Network on the touchscreen and confirm the printer shows a valid IP address and Wi-Fi signal indicator.
2. If the signal appears weak, move the printer closer to your Wi-Fi router — even a metre or two can make a significant difference. If your router broadcasts both 2.4 GHz and 5 GHz bands, switch the printer to 2.4 GHz, which offers better range through walls even at lower peak speed.
3. Navigate to Settings > Storage on the printer and check how much free space is available. Time-lapse videos and saved print files accumulate quickly. Delete any unnecessary recordings or files to free space before retrying.
4. Retry the firmware update from the Anycubic app (My Devices > Firmware Update) or directly from the printer’s touchscreen update menu. Allow the process to run without switching off the printer or interrupting the Wi-Fi network.
5. If OTA continues to fail, download the firmware package manually from the Anycubic official website (wiki.anycubic.com), copy it to a USB flash drive formatted as FAT32, insert the drive into the printer, and install via Settings > Firmware > Update from USB. This method bypasses the Wi-Fi download entirely.
6. After a successful update, verify the new firmware version is shown in Settings > About.

Parts Required

• USB flash drive (FAT32 formatted, if using manual USB firmware install)

No replacement parts are required — error 10801 is caused by a network or storage issue, not a hardware failure.

If you cannot complete the update via USB or the printer reports an error during the flash phase, contact Anycubic support for assistance.

Frequently asked questions

What does Anycubic 10801 mean?

Anycubic error 10801 (Firmware Download Failed) appears on the Kobra 3, Kobra 3 Combo, Kobra S1, and Kobra S1 Combo when an over-the-air (OTA) firmware update is initiated through the Anycubic app or the printer touchscreen but the download does not complete successfully. The printer retains its current firmware version and continues to function — the update simply did not install.

How do I fix Anycubic 10801?

Anycubic error 10801 means an OTA firmware update did not complete. Fix Wi-Fi issues, storage limits, and use USB as a fallback on Kobra 3 and Kobra S1 printers.