# Discussion of Snapmaker 2.0 Firmware Updates **URL:** \ **Category:** Snapmaker 2.0 (3-in-1)\ **Created:** [February 27, 2020, 6:39am UTC](https://forum.snapmaker.com/t/discussion-of-snapmaker-2-0-firmware-updates/5441 "2020-02-27T06:39:15Z")\ **Posts on this page:** 1\ **Showing post:** 693
**Author:** ![takeota](https://avatars.discourse-cdn.com/v4/letter/t/7ab992/32.png) [@takeota](https://forum.snapmaker.com/u/takeota)\ **Post date:** [June 3, 2023, 3:20pm UTC](https://forum.snapmaker.com/t/discussion-of-snapmaker-2-0-firmware-updates/5441/693 "2023-06-03T15:20:03Z")
I suspect that there is a critical bug in the latest firmware 1.15.26. When trying to print with dual extruders and using materials with different temperature settings, the start Gcode M104 is not recognized properly and the tool may not be able to heat up. (Printing starts without heating) By reverting the firmware to 1.15.23, the same Gcode could be used without problems. The code described is nothing special. Example: ;TYPE:Custom M82 ;absolute extrusion mode ;Start GCode begin G28 ;home M104 S270 T0 ; Preheat left extruder M104 S220 T1 ;Preheat right extruder M140 S100 ;Start Warming Bed M109 S270 T0 ; Wait for left extruder M109 S220 T1 ; Wait for right extruder M190 S100 ;Wait for Bed Temperature G90 ;absolute positioning G0 X-10 Y-10 F3000 G0 Z0 F1800 --- _[View the full topic](https://forum.snapmaker.com/t/discussion-of-snapmaker-2-0-firmware-updates/5441)._