Fix M107 when dual-nozzles share fan (#12819) (#12909)

6 years ago · f11c6d5d02
1 changed files with 2 additions and 1 deletions
--- a/Marlin/src/gcode/temperature/M106_M107.cpp
+++ b/Marlin/src/gcode/temperature/M106_M107.cpp
@ -63,7 +63,8 @@ void GcodeSuite::M106() {
 * M107: Fan Off
 */
 void GcodeSuite::M107() {
-  thermalManager.set_fan_speed(parser.byteval('P', active_extruder), 0);
+  const uint8_t p = parser.byteval('P', MIN(active_extruder, FAN_COUNT - 1));
+  thermalManager.set_fan_speed(p, 0);
 }

 #endif // FAN_COUNT > 0