Cannot Turn Extruder Fan On with M106

[ralphferro 0]

I have entered M106 in Start under the Start/End G-code tab in Cura.

However, the extruder fan will not turn on.

 

[gr5 2,071]

First of all you need to include the speed if you have a Marlin based machine. 255 is max speed. Try this:

M106 S255

What kind of printer do you have? UM Original? UM2?

Cura probably inserts a M107 right after your M106 which of course turns the fan immediately right back off again. Look at the resulting gcode file in an editor and search for all instances of M106 and M107.

Do you know if your fans work at all?