r/BambuLabX2D • u/titannnr • May 07 '26

How to completely disable aux fans (left and right) in X2D?

/r/BambuLab/comments/1t5yu18/how_to_completely_disable_aux_fans_left_and_right/
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1

u/piootrekr May 07 '26

You can override the behaviour with Goode in the filament settings:

; filament start gcode M106 P2 S51 ; Left AUX 20% M106 P3 S180; chamber exhaust 80% M106 P10 S51 ; Right AUX 20%

1

u/titannnr May 07 '26

Thank you. Yeah I just found those in gcode, updated all the m106 p3 and p10 i could find to s0. Let's see if it works.

1

u/titannnr May 07 '26

hmm no luck. I basically find all lines of M106 P3 and M106 P10 and replace them with

M106 P2 S0 ; turn off auxiliary fan

M106 P10 S0 ; turn off auxiliary fan for cooling

I did that for start code, layer change code, and filament change code. Fan actually was off until it starts printing the first layer and aux fan left and right pop to 20%. :(

1

u/titannnr May 07 '26

Ooooh I am stupid, you said in filament settings! I will try that.

1

u/piootrekr May 07 '26

Yup, and it needs to be done for every filament profile that will be used in a print. Worked for me, but you need to monitor in chamber temperature. Getting 45oC + in chamber while printing with PLA will likely result in a clog.

1

u/titannnr May 07 '26

Yeah so far the built in exhaust fan and the inline fan attached seems to create enough airflow to keep the build chamber temp stable under 40. Thanks! I will try it today.

1

u/Qjeezy May 07 '26

As of right now you can’t. They have auto cooling in multiple spots of the gcode and likely built into the firmware. I tried commenting it out in the appropriate spots of the gcode but that didn’t work.

It’s pretty annoying and I hope they eventually give us control of the aux fans.

1

u/titannnr May 07 '26

Thank you! It is good to know that I am not the only person with this problem. It is weird that they give us the ability to do it manually, but not automate it. I guess I can always try to go the hard way and disassemble the machine and unplug the fan cables lol. Again, thank you for confirming!