Factory reset (MK2S/MK2.5S/MK3S)

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A factory reset can be used during troubleshooting to wipe configuration, calibration, and statistics data from your printer's memory.

There are two ways how to perform a factory reset. The procedure depends on your firmware version. First, find out your firmware version number by navigating to LCD menu - support - Firmware. Once you know the version number, use the corresponding instructions below. We recommend keeping your printer's firmware up to date.

Firmware 3.0.11 and newer

With this firmware release, we made the Factory reset significantly easier to perform. Simply follow these 3 steps below:

1. Press and release the reset button marked X and positioned under the control knob on the LCD panel.
2. Immediately press and hold the Control knob until "Factory reset" is displayed on the LCD display (after 2-3 seconds). Depending on your settings, you will also get a sustained beep.
3. Release the control knob and a new menu should appear.

The LCD screen will show a menu with the following options:

• Language: Resets language preference and enables you to choose a new language.
• Statistics: Will erase all records of print time and used material from the memory.
• Shipping prep: Resets only the printer language selection. All the calibration data including the Liveadjust Z remain intact. Even though the calibration data are still present and functional, the printer will ask the user to run the Calibrate Z function. This “light” factory reset is mainly used to reset assembled printers before we ship them out of the factory so that users can select their language and run Calibrate Z after unpacking.
• Service prep (starting from firmware 3.10.0): The same as Shipping prep, but does not clear the print statistics.
• All data: Resets everything including all calibration data, meaning the whole EEPROM is erased. After this reset, the user is expected to go through the calibration flow again, with the exception of the sensor height setting.
• Bowden length (only for Multimaterial firmware): This option is used when you want to change the Bowden cable setup, and the length of new cables is different from the original factory parts. After the reset, you can adjust the length on this menu.

Firmware 3.0.8 to 3.0.11 (Before May 2017)

Light factory reset

1. Press and release the reset button (marked X and positioned under the control knob on the LCD panel)
2. Once you see the text "Original Prusa i3 Prusa Research", QUICKLY press and hold the control knob until you hear a beep
3. Release the control knob

If done correctly, the printer LCD screen will show the language selection.

Full factory reset

The full reset procedure is a bit more complex to avoid an accidental reset, which would be followed by a 20-minute-long calibration process.

1. Press and release the reset button (marked X and positioned under the control knob on the LCD panel)
2. Once you see the text "Original Prusa i3 Prusa Research", QUICKLY press and hold the control knob until you hear a beep
3. Release the control knob
4. Immediately press and hold the control knob until you hear a double beep
5. Release the control knob

If done correctly, the printer LCD screen will show the language selection.