<p>The message on your LCD saying &nbsp;<strong>Please open idler and remove filament manually</strong> shows up when the extruder motor does not succeed to remove the filament from the hotend/extruder. Please do not panic, this can be solved very quickly and you do not need to abort the print.</p>
<p><img decoding="async" style="display: block; margin-left: auto; margin-right: auto;" src="https://cdn.help.prusa3d.com/wp-content/uploads/prusuki/prusuki-images/please-open-idler-small.jpg"></p>
<div class="tip-callout">If you get this error before a new print while you want to change the filament, first just try to <strong>load</strong> the filament again into the preheated hotend. The filament tip will melt again and it should be easier to remove it afterward. If that is unsuccessful, go through the following steps.</div>
<h3>Troubleshooting</h3>
<div class="note-callout"><strong>Follow our <a href="http://help.prusa3d.com/article/removing-filament-from-extruder-manually_121491">illustrated guide</a> to resolve this.</strong></div>


Please open idler and remove filament manually

Prosim otevrete idler a manualne odstrante filament.

Bitte Spannrolle öffnen und Filament von Hand entfernen

Abre el tensor y retira el filamento manualmente

Veuillez ouvrir l'idler et retirez le filament manuellement

Aprire l'idler e rimuovere il filamento manualmente

アイドラーを開き、フィラメントを手動で取り外してください

Proszę odciągnąć dźwignię dociskową ekstrudera i ręcznie usunąć filament

Original Prusa Curing and Washing Machine (CW1S) is a recommended accessory for the Original Prusa SL1S

Original Prusa CW1 to CW1S platform upgrade

Original Prusa Enclosure assembly

Original Prusa XL - beta test

Original Prusa XL assembly

The Original Prusa i3 MK3S+ is the successor of the award-winning Original Prusa i3 MK2S 3D printer.

Original Prusa i3 MK3S+ kit assembly

Original Prusa SL1 to SL1S SPEED upgrade

Original Prusa MINI+ kit assembly

The Original Prusa MINI+ is a compact 3D printer with all the bells and whistles you would expect from the creators of the award-winning Original Prusa i3 MK2 and MK3S!

Original Prusa MINI+ semi-assembled

Original Prusa i3 to MMU2S upgrade

Original Prusa i3 MK3/MK3S to MK3S+ upgrade

Original Prusa SL1 3D printer is based on the MSLA printing process. Unlike Original Prusa i3 machines, this printer uses a high-resolution LCD panel and a UV LED to cure thin layers of resin to achieve an unprecedented level of detail.

Original Prusa SL1 kit assembly

The Original Prusa i3 MK3S is the successor of the award-winning Original Prusa i3 MK3 3D printer.

Original Prusa i3 MK3S kit assembly

Original Prusa i3 MK1 to MK2 upgrade

Original Prusa i3 Plus 2.85 mm to 1.75 mm upgrade

Original Prusa i3 Plus 1.75 mm to MK2S upgrade

Original Prusa i3 Plus 1.75 mm kit assembly

Original Prusa i3 MK2 to MK2S upgrade

Original Prusa i3 MK2/S to MMU1 upgrade

The Original Prusa MINI/MINI+ is a compact 3D printer with all the bells and whistles you would expect from the creators of the award-winning Original Prusa i3 MK2 and MK3S!

Original Prusa MINI assembly

Original Prusa i3 MK2S is a successor to Original Prusa i3 MK2 with small hardware tweaks for easier assembly and improved reliability.

Original Prusa i3 MK2S kit assembly

Original Prusa i3 MK2 kit assembly

Original Prusa i3 MK2S to MK3 upgrade

The Original Prusa i3 MK3 is the successor of the award-winning Original Prusa i3 MK2 3D printer.

Original Prusa i3 MK3 kit assembly

Original Prusa i3 MK3 to MK3S upgrade

Original Prusa i3 MK2 MMU1 to MK2.5S MMU2S

Original Prusa i3 MK2 to MK3S upgrade

Original Prusa i3 MK3/MK2.5 to MMU2 v1.01

Original Prusa i3 MK2.5 to MK2.5S upgrade

Original Prusa i3 MK2 to MK2.5S upgrade

Assembly manuals

Basic calibration

Advanced calibration

What to do when the printer reports an error message during calibration.

Calibration Error Messages

All information you need to know to learn how to calibrate your 3D printer to achieve perfect prints.

Calibration

Printer description

Printer features

FAQs and other useful information you might be interested in before or after making your purchase at shop.prusa3d.com

General Information

Basic overview of your 3D printer and it's features, plus general Prusa Research info.

About your printer

3D models

Material guide

Printer maintenance

Prusa Connect & PrusaLink

Slicing

In this section, you can find material guides, printer troubleshooting and general info about using your printer.

Using the printer

Print Quality Troubleshooting

Printer troubleshooting

QR Error codes

Print Error Messages

Description of how to recognize and solve common problems, especially hardware and electronics related.

Troubleshooting

Nozzles

Octoprint

Printer simulator

Protective Shields

Learn about different nozzles, Raspberry Pi connection, Octoprint and more.

3rd party accessories & Other projects

About PrusaSlicer

Configuration and profiles

User interface

Input/output

Left toolbar

Top toolbar

Print settings

Filament settings

Printer settings

Advanced features

Multi-material slicing

SLA slicing

Other (PrusaSlicer)

The official documentation for the PrusaSlicer slicing software. From basic configuration to advanced settings like modifier meshes.

PrusaSlicer

P.I.N.D.A. sensor

Thermistor

Filament sensor

M.I.N.D.A. sensor

MINI

Tube fitting

Print fan

USB port

Power Button

Liquid Resin

Curing / Solidifying

Lid (SL1)

Whole mechanical assembly of SL1 print platform

Tilt

Tank

Selector knob

Filament buffer

Wipe tower / Purge tower

Micro USB port

Reset button

Firmware

Long PTFE between an extruder motor and hotend

Bowden tube

Controller board

Blade

Hotend

Ethernet port (LAN)

Power switch

Extruder / Extruder motor

Nozzle

Print head

Extruder PTFE tube (bowden MINI)

LCD screen

Spool holder

SL1 file (*.sl1)

Print display (SL1)

Heatbed

Belt tension

Extruder

Flexible steel sheet

Chimney (IR-sensor-holder-MMU2S)

Control Buttons (MMU2S)

Indicator LEDs (MMU2S)

Selector motor (MMU2S)

Pulley motor (MMU2S)

Idler motor (MMU2S)

F.I.N.D.A. sensor (MMU2S)

Live Adjust Z

Filament tip

Tension Screws (MMU2S)

Idler screw

Print speed

Heater cartridge

Filament sensor introduced with the S-upgrade of MK3 and MMU2

IR filament sensor

Selector (MMU2S)

MMU idler (MMU2S)

Diameter of filament compatible with Original Prusa printers.

1.75 mm

FFF/FDM

Filament

Bondtech gears

Hotend thermistor

Heatbed thermistor

Heat block

Modifier meshes

Support enforcers

Support blockers

Hollowing

Original Prusa MK3

Original Prusa MK3S

Original Prusa SL1

Original Prusa MMU2S

Touch screen

Check the cables

Tower / Z-Axis

UV led panel

Knob (SL1)

Connected to the printer and used with Octoprint

Raspberry Pi

Prusa Connect

Prusa Connect Local

SD card

USB drive

Test

test relation1122

Einsy

Original Prusa MK2.5

Original Prusa MK2.5S

Heatsink

Print platform

SuperPINDA

Mesh bed leveling

for securing PTFE in the MINI brass fitting

Olive

Buddy board

FEP foil

Tilt motor

Cantilever

Hotend fan

<p>The <strong>Bed leveling failed</strong> error appears when there is something wrong with the last stage of the calibration. This calibration is the last step of XYZ calibration and is performed before each print.&nbsp;</p>
<div class="warning-callout">For <strong>MK2.5/MK2.5S printers that have the SuperPINDA</strong> installed, you <strong>MUST use firmware version 3.9.3, or above!</strong></div>
<p>There can be <strong>three different error messages</strong> related to the Bed leveling failed:&nbsp;</p>
<ul>
<li>Sensor didnt trigger. Debris on nozzle? Waiting for reset.</li>
<li>Sensor triggered too high. Waiting for reset.</li>
<li>Sensor disconnected or cable broken. Waiting for reset.</li>
</ul>
<p><img decoding="async" style="display: block; margin-left: auto; margin-right: auto;" src="https://cdn.help.prusa3d.com/wp-content/uploads/prusuki/prusuki-images/bed-leveling-failed-small.jpg"></p>
<h3>Troubleshooting</h3>
<h4>"Sensor didn't trigger. Debris on nozzle? Waiting for reset"</h4>
<ol>
<li>Make sure the nozzle and heatbed are clear of any plastic.</li>
<li>Do the Z calibration through the<strong>&nbsp;LCD Menu - Calibration - Calibrate Z,&nbsp;</strong>which also levels the X-axis.&nbsp;</li>
<li>Try to resume the calibration or start the print again (depending on when the error occurred).</li>
<li>If you are still struggling with these error messages, it is recommended to go through the whole calibration again. You can follow this walkthrough <a href="http://help.prusa3d.com/article/xyz-calibration-error-messages-mk3-mk3s-mk3s_112340">XYZ-calibration error-messages (MK3/MK3S/MK3S+)</a> or <a href="http://help.prusa3d.com/article/xyz-calibration-error-messages-mk2-s_112407">XYZ Calibration error-messages (MK2/S)</a>.</li>
</ol>
<h4>"Sensor triggered too high. Waiting for reset."</h4>
<ol>
<li>Make sure the hotend is fully inserted into the extruder.&nbsp;</li>
<li>Do the Z calibration through the<strong>&nbsp;LCD Menu - Calibration - Calibrate Z,</strong> which also levels the X-axis.</li>
<li>Try to resume the calibration or start the print again (depending on when the error occurred).</li>
<li>If you are still struggling with these error messages, it is recommended to go through the whole calibration again. You can follow this walkthrough <a href="http://help.prusa3d.com/article/xyz-calibration-error-messages-mk3-mk3s-mk3s_112340">XYZ-calibration error-messages (MK3/MK3S/MK3S+)</a> or <a href="http://help.prusa3d.com/article/xyz-calibration-error-messages-mk2-s_112407">XYZ Calibration error-messages (MK2/S)</a>.</li>
</ol>
<h4>Sensor disconnected or cable broken. Waiting for reset.</h4>
<ol>
<li>Make sure that the P.I.N.D.A. sensor is properly plugged into the electronics board. You can double-check that using the <a href="http://help.prusa3d.com/article/einsy-rambo-electronics-wiring-mk3-mk3s-mk3s_2107">Einsy RAMBo electronics wiring (MK3/MK3S/MK3S+)</a> or <a href="http://help.prusa3d.com/article/mini-rambo-electronics-wiring-mk2s-mk2-5-mk2-5s_2109">Mini RAMBo electronics wiring (MK2S, MK2.5, MK2.5S)</a> guides.</li>
<li>Visually check the PINDA sensor cable, look for any overtightened zip-ties which might be preventing the P.I.N.D.A. sensor to work properly.</li>
<li>Check the PINDA sensor, you can find more information on how to do that at <a href="http://help.prusa3d.com/article/p-i-n-d-a-superpinda-sensor-testing_2091">P.I.N.D.A./SuperPINDA Sensor testing</a>.</li>
</ol>
<div class="tip-callout">After adjusting the PINDA sensor or any other hardware, we recommend running the Calibration Wizzard from the beginning.</div>


Bed leveling failed

<p>The error message <strong>Blackout occurred. Recover print?</strong> appears if the power goes off for a longer period of time during printing, and the hotend and heatbed cool down. Therefore, the printer will wait for you to safely resume the print.</p>
<p>There is not much troubleshooting to do, so here's a couple&nbsp;of things you should check before resuming or canceling the print.</p>
<figure><img decoding="async" style="display: block; margin-left: auto; margin-right: auto;" src="https://cdn.help.prusa3d.com/wp-content/uploads/prusuki/prusuki-images/blackout-occured-small.jpg"></figure>
<h4>Troubleshooting</h4>
<ol>
<li>Make sure that all of the printed objects are still <strong>attached to the steel sheet plate</strong>.</li>
<li>Follow the instructions on the LCD screen and resume the print.</li>
<li>Stay with the printer for <strong>10 minutes</strong> and make sure that the print continues without any problems.</li>
<li>If you suspect that at least one of the printed objects is about to get loose, <strong>it is usually better to restart the print</strong>.</li>
</ol>


Blackout occurred. Recover print?

<p>The <strong>EXTR. FAN ERROR&nbsp;</strong>message appears when the extruder fan does not receive any RPM (Revolutions per Minute) readings, in other words, there is something preventing it from spinning. The extruder fan is the Noctua fan on the left of the extruder. If you have issues with the front print fan, please see <a href="http://help.prusa3d.com/article/print-fan-is-not-spinning_2081">Print fan is not spinning</a>.</p>
<p><img decoding="async" style="display: block; margin-left: auto; margin-right: auto;" src="https://cdn.help.prusa3d.com/wp-content/uploads/prusuki/prusuki-images/extr-fan-errpr.jpg"></p>
<h3>Troubleshooting</h3>
<div class="tip-callout">From the <em>LCD menu - Support - Extruder Info,</em> you can find the RPM reading of the 3-wire fans that support this. <strong>The expected range should be from ~3500 - 4200 RPM on both fans,</strong> when running at full speed. Only the print fan speed can be adjusted by the user.</div>
<ol>
<li>Visually inspect the extruder fan and make sure there is no debris preventing it from spinning.</li>
<li>Bigger parts can be cleared with <strong>tweezers</strong>, dust can be cleared with a <strong>computer cleaner spray</strong> (hold the fan with your hand while blowing at it, otherwise, you might damage the blades).</li>
<li>If you have replaced one of the fans with a replacement not supporting RPM sensing, then you can turn off the monitoring in the&nbsp;<strong>LCD Menu - Settings - Check fans.</strong></li>
<li>If the extruder fan stopped working completely, it must be replaced. You can purchase a new one at our <a href="https://shop.prusa3d.com/en/mk3mk3s/199-hotend-fan-noctua.html">e-shop</a> or contact the support for a <a href="http://help.prusa3d.com/article/warranty_2288">Warranty</a> replacement.</li>
</ol>
<p><img decoding="async" style="display: block; margin-left: auto; margin-right: auto;" src="https://cdn.help.prusa3d.com/wp-content/uploads/prusuki/prusuki-images/noctua-fan.png" height="400"></p>


Err: EXTR. FAN ERROR

<p><strong>PRINT FAN ERROR&nbsp;</strong>error message occurs when the print fan (the one at the front of the extruder) does not receive any RPM (Revolutions per Minute) readings. This can be caused by the fact that the fan does not spin, or by the signal (yellow) cable being interrupted.&nbsp;</p>
<p><img decoding="async" style="display: block; margin-left: auto; margin-right: auto;" src="https://cdn.help.prusa3d.com/wp-content/uploads/prusuki/prusuki-images/print-fan-error-small.jpg"></p>
<h3>Troubleshooting</h3>
<p>Visually inspect the print fan and make sure there is no debris or pieces of filament tangled in it, preventing it from spinning. Bigger parts can be cleared with <strong>tweezers</strong>, dust can be cleared with a&nbsp;<strong>computer cleaner spray</strong> (canned air).</p>
<div class="note-callout">Hold the fan vanes with your hand while blowing at it, otherwise, you might damage the motor.</div>
<h4>Connector</h4>
<div>It could just be a bad connection. Unplug, then plug back in, the <a href="http://help.prusa3d.com/article/einsy-rambo-electronics-wiring-mk3-mk3s-mk3s_2107">connector of the print fan on the EinsyRAMBO</a>.</div>
<h4>Broken wire</h4>
<p>If the error shows up even after cleaning the fan, see if it could be reproduced, by starting the fan from <span style="font-family: 'courier new', courier, monospace;"><em>Settings -&gt; Temperature -&gt; Fan speed -&gt; 255</em>,</span>&nbsp;and then moving the extruder manually along the X-axis, to the right and to the left multiple times.</p>
<p><strong>See if the fan at any time stops spinning</strong>. Also, check the cables and wiggle with the extruder cable bundle a bit. The culprit is usually within the harness, near the extruder body.</p>
<div class="tip-callout">If you have replaced one of the fans with a replacement part not supporting RPM sensing, then you can turn off the monitoring in the&nbsp;<strong>LCD Menu - Settings - Check fans.</strong></div>
<h4>Check RPM</h4>
<div class="hd--html">While the fan is turned on as instructed in the previous step, navigate to Support -&gt; Extruder info. Check if the RPM reading for "Print fan" is around <strong>3500 - 4200 RPM</strong>, and does not change drastically when the extruder is moved. Exact RPM may vary, but any large change, or a zero-value, is an indication of a break in the wire.</div>
<div>
<div class="note-callout">If you find you need to replace the fan, you can follow our guides <a href="http://help.prusa3d.com/guide/how-to-replace-a-print-fan-mk3s-mk3s_160876">How to replace a print fan (MK3S/MK3S+)</a> or <a href="http://help.prusa3d.com/guide/how-to-replace-a-print-fan-mini_118310">How to replace a print fan (MINI)</a></div>
</div>


Err: PRINT FAN ERROR

Please open idler and remove filament manually

Troubleshooting

Comments

Still have questions?