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Easy Fix
Creality · FDM 3D Printers
Firmware Emergency Stop Activated
Quick Answer
Error code KILL on your Creality FDM 3D Printers means: Firmware Emergency Stop Activated. This is usually fixable — see the step-by-step guide below.
Affected Models
Applies to all models
CR-10 SECR-10 Smart ProEnder-3 S1 ProEnder-3 V3Ender-3 V3 SEEnder-5 S1K1K1 Max
Likely Causes
  1. A critical safety check failed in the firmware (cascading from another error)
  2. Host software sent an emergency stop command (M112)
  3. Watchdog timer expired due to firmware hang or loop
  4. User pressed the emergency stop button or triggered it via the LCD
How to Fix It
1
Read the full error message on the LCD or terminal output to identify the root cause
2
Power cycle the printer by turning off the PSU switch, waiting 10 seconds, then turning back on
3
Check the serial log or OctoPrint terminal for the error that preceded the KILL command
4
If triggered by software, ensure your slicer or host is not sending unexpected commands
Pro Tip
This is a common issue that most users can resolve without specialized tools. Try the first step before moving on to more complex solutions.
Parts You May Need
Replacement component for the underlying root cause error
USB-to-serial adapter for terminal debugging
Related Error Codes
THERMAL_RUNAWAYHEATING_FAILEDBED_THERMAL_RUNAWAYBED_HEATING_FAILEDMINTEMP
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