Hi there! I am Luis from Puerto Rico. I just joined the group! On Marlin, for my board, Azteeg X3 (67), pin 4 is the default for the controller fan (the fan that is turned on all the time) and pin 9 for the hot-end fans. I know how to change the pin for the hot-end fans (on pins.h on line 650 on the firmware mentioned at the end of this post) but I don't find where to change the pin for the controller fan. The thing is that pin 4 (the default for the controller fan) is damaged and I've tested that other pins, like pin 11 are working fine. How do I change the controller board pin on Marlin? PS: I've made some guesswork on 'Configuration_adv.h' and 'Marlin_main.cpp' with no results. But then, just guesswork. I greatly appreciate your help. The Marlin I am using is here [wiki.re3d.org] on the first link (non-heated bed). https://reprap.org/forum/read.php?147,499901,499901#msg-499901 Sun, 14 Jun 2026 06:40:42 -0400 Phorum 5.2.23 https://reprap.org/forum/read.php?147,499901,499901#msg-499901 https://reprap.org/forum/read.php?147,499901,499901#msg-499901
I am Luis from Puerto Rico. I just joined the group!

On Marlin, for my board, Azteeg X3 (67), pin 4 is the default for the controller fan (the fan that is turned on all the time) and pin 9 for the hot-end fans. I know how to change the pin for the hot-end fans (on pins.h on line 650 on the firmware mentioned at the end of this post) but I don't find where to change the pin for the controller fan.
The thing is that pin 4 (the default for the controller fan) is damaged and I've tested that other pins, like pin 11 are working fine.

How do I change the controller board pin on Marlin?

PS: I've made some guesswork on 'Configuration_adv.h' and 'Marlin_main.cpp' with no results. But then, just guesswork.
I greatly appreciate your help.

The Marlin I am using is here [wiki.re3d.org] on the first link (non-heated bed).]]> oscarte Firmware - experimental, borrowed, and future Tue, 21 Apr 2015 13:45:11 -0400