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4. Note: You may need to go to “Menu > Settings > Machine > EEPROM > Reset” to properly
reset the print back to the factory settings after the firmware update. The printer will display
“Failed to enable bed leveling” after a reset because the bed leveling matrix has been erased.
Click OK and run bed leveling again.
Firmware Error Codes and Troubleshooting
• Homing Failed
o Typically, this error is a result of the extruder not recognizing the X or Y axis minimum
limits during homing. It also could be a result of the BLTouch not registering the home
or false triggering as the extruder lowers. Make sure the path is clear for the extruder
and any ribbon cables or wires are not loose.
• Heating Failed (Hotend and Bed)
o If the hotend or bed fails to heat even 1 degree, after being instructed to do so, over 15
seconds it will trigger a heating failed event.
o Check all the wiring and connections.
o Make sure your space isn’t too cold or the bed might have trouble heating.
o Make sure the bed is plugged in and the fuse isn’t blown (located where the power cord
plugs into the SSR).
• Thermal Runaway
o If the hotend or bed registers a temperature far outside the target for a long period, a
thermal runaway will trigger to protect the printer and you. Check to see if the
thermistor is malfunctioning primarily by moving the wire when it’s set to a
temperature. If the temp jumps wildly you may need to replace the thermistor and/or
wire. Also inspect the wires and connectors for damage.
• Probing Failed
o Typically if your x-axis or bed is very far out of alignment, a probing failed event will
occur. This happens is the extruder is trying to probe a point below the safety margin.
Make sure your x-axis is level and your bed isn’t distorted. Make sure the bltouch pin is
dropping as you home and its not false triggering.
o Probing failed may occur if you place a G29 command in your gcode. Remove the
command and level the bed from the bed leveling menu.
• Min/Max Temp
o Min temp errors occur if the extruder or bed registers a zero temp as you are trying to
heat or start a print. Inspect the wires for damage and replace thermistors/wires if
necessary.
• Heating Failed
o If the hotwend and or bed display a temperature but doesn’t heat it will trigger a
heating failed event after a period of time. Check the wires and connectors for damage.
Replace wires or connectors or heater cartridge if necessary.
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