extruder fan is not affected by FAST_PWM_FAN In the latest version of marlin (1.1.8), I set the E0_AUTO_FAN_PIN to 44 and FAN_PIN to 9. I tried to reduce the fan speed for the extruder by setting EXTRUDER_AUTO_FAN_SPEED, but the PWM caused some noticeable noise. To reduce such noise, FAST_PWM_FAN was defined. However, it seems the FAN_PIN is affected by FAST_PWM_FAN but not the E0_AUTO_FAN_PIN. Is there a way to set a faster PWM on an extruder fan pin? https://reprap.org/forum/read.php?415,827041,827041#msg-827041 Wed, 16 Sep 2026 20:40:25 -0400 Phorum 5.2.23 https://reprap.org/forum/read.php?415,827041,827041#msg-827041 extruder fan is not affected by FAST_PWM_FAN https://reprap.org/forum/read.php?415,827041,827041#msg-827041 zmc9499 Firmware - Marlin Tue, 26 Jun 2018 18:53:42 -0400