# Dual extruder nozzles not heating up **URL:** \ **Category:** Snapmaker 2.0 (3-in-1)\ **Created:** [June 17, 2023, 6:16pm UTC](https://forum.snapmaker.com/t/dual-extruder-nozzles-not-heating-up/31824 "2023-06-17T18:16:40Z")\ **Posts on this page:** 1\ **Showing post:** 12
**Author:** ![takeota](https://avatars.discourse-cdn.com/v4/letter/t/7ab992/32.png) [@takeota](https://forum.snapmaker.com/u/takeota)\ **Post date:** [June 19, 2023, 7:09am UTC](https://forum.snapmaker.com/t/dual-extruder-nozzles-not-heating-up/31824/12 "2023-06-19T07:09:35Z")
I had been experiencing a nozzle temperature control not responding with the latest firmware. It is unclear under what conditions this will occur. I don’t know if this is related to your problem or not, but you can check it out if you like. > [@Discussion of Snapmaker 2.0 Firmware Updates](https://forum.snapmaker.com/t/discussion-of-snapmaker-2-0-firmware-updates/5441/693): > > 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 ;h… --- _[View the full topic](https://forum.snapmaker.com/t/dual-extruder-nozzles-not-heating-up/31824)._