- In case the printing is aborted because of any reason, also the fan is turned off now.
- In case there is a printing from the SD card going on and a temperature sensor becomes defect, the printing is aborted.
  - This functionality can be turned on and off via the FEATURE_ABORT_PRINT_AFTER_TEMPERATURE_ERROR switch.
  - A printing via the PC is not affected by this functionality and the printer continues to run in dry mode like it did until now already.
- Adding of additional beeper outputs for various changes of the printer state:
  - start/abort/stop printing via the SD card
  - pause/continue printing
  - start/abort/stop heat bed scan
- The beeper can be turned on and off via the menu "Configuration" -> "General" -> "Beeper".
  - BEEPER_MODE from Configuration.h can be used in order to define whether the beeper shall be on or off by default.
  - The beeper mode also can be stored to/restored from the EEPROM.
- Optional emergency z-stop in order to detect a possible collision (extruder against heat bed).
  - This feature can be turned on via FEATURE_EMERGENCY_Z_STOP.
  - This feature can be configured via EMERGENCY_Z_STOP_DIGITS_MIN, EMERGENCY_Z_STOP_DIGITS_MAX, EMERGENCY_Z_STOP_INTERVAL and EMERGENCY_Z_STOP_CHECKS.
- Moving to V 0.91.25.