[Marlin] M104 - Set Hotend Temperature

📅Update: 2020/09/18


Set a new target hot end temperature and continue without waiting. The firmware will continue to try to reach and hold the temperature in the background.

Use M109 to wait for the hot end to reach the target temperature.


  • With PRINTJOB_TIMER_AUTOSTART this command will stop the print job timer if the temperature is set at or below half of EXTRUDE_MINTEMP.


M104 [B<temp>] [F<flag>] [I<index>] [S<temp>] [T<index>]


  • [B<temp>] AUTOTEMP: The max auto-temperature.

  • [F<flag>] AUTOTEMP: Autotemp flag. Omit to disable autotemp.

  • [I<index>] Material preset index. Overrides S.

  • [S<temp>] Target temperature. AUTOTEMP: the min auto-temperature.

  • [T<index>] Hotend index. If omitted, the currently active hotend will be used.


Set target temperature for the active hotend

M104 S185

Set target temperature for E1

M104 T1 S205

AUTOTEMP: Set autotemp range

M104 F S180 B190

AUTOTEMP: Disable autotemp


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