# ! MCU 'THR' shutdown: weight\_error

**URL:** <https://klipper.discourse.group/t/mcu-thr-shutdown-weight-error/26277>\
**Category:** General Discussion\
**Created:** [September 5, 2026, 8:55pm UTC](https://klipper.discourse.group/t/mcu-thr-shutdown-weight-error/26277 "2026-09-05T20:55:32Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![x1967](https://avatars.discourse-cdn.com/v4/letter/x/77aa72/32.png) [@x1967](https://klipper.discourse.group/u/x1967)\
**Post date:** [September 5, 2026, 8:55pm UTC](https://klipper.discourse.group/t/mcu-thr-shutdown-weight-error/26277/1 "2026-09-05T20:55:32Z")

</div>

### Basic Information:

Printer Model:qidi q2c  
 MCU / Printerboard:  
 Host / SBC  
 klippy.log

_Fill out above information and_ _ **in all cases attach your** _ **`klippy.log` _file_** (use zip to compress it, if too big). _Pasting your_ `printer.cfg` _is **not** needed_  
_ **Be sure to check our “Knowledge Base” Category first. Most relevant items, e.g. error messages, are covered there** _

### Describe your issue:

Just replaced both fans and the print head (hotend and nozzle). First time failure had filament melted all over the print head, melting wires to the fans.

Not real smart at the 3d printing. we have several printers and this was our first major failure.  
After replacing the fans and trying to print we get this error on every print.

We have the box and all those settings are the same as before the damage to wires.

don’t understand the weight\_error cant find it any where that i have searched.

We have a qidi q2 that i replaced the print head (hotend and nozzle) and one fan and its printing normal

15:47:48 // MCU ‘THR’ shutdown: weight\_error  
// CS传感器有问题，请检查一下接线！  
// Once the underlying issue is corrected, use the  
// “FIRMWARE\_RESTART” command to reset the firmware, reload the  
// config, and restart the host software.  
// Printer is shutdown

15:47:48 !! MCU ‘THR’ shutdown: weight\_error

15:47:48 // MCU ‘THR’ shutdown: weight\_error  
// CS传感器有问题，请检查一下接线！  
// Once the underlying issue is corrected, use the  
// “FIRMWARE\_RESTART” command to reset the firmware, reload the  
// config, and restart the host software.  
// Printer is shutdown

15:47:48 !! MCU ‘THR’ shutdown: weight\_error

Any help or advice would be appreciated.

Bill

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<div class="post-metadata">

**Author:** ![cardoc](https://avatars.discourse-cdn.com/v4/letter/c/ec9cab/32.png) [@cardoc](https://klipper.discourse.group/u/cardoc)\
**Post date:** [September 5, 2026, 9:47pm UTC](https://klipper.discourse.group/t/mcu-thr-shutdown-weight-error/26277/2 "2026-09-05T21:47:37Z")

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Please review the header for a new post.

> [@x1967](#):
>
> _and_ _ **in all cases attach your** _ **`klippy.log` _file_**

No way we can help without a klippy.log

Note: It is likely your error is originating with qidi specific (not open source) mods to klipper. You should attempt to contact qidi support and/or a qidi user forum.

> [@3D Printers with Preinstalled and Modified Klipper Versions](https://klipper.discourse.group/t/3d-printers-with-preinstalled-and-modified-klipper-versions/20467/1):
>
> Rationale With the growing popularity of Klipper as a firmware option for high-speed, high-quality 3D printing, some Original Equipment Manufacturers (OEMs) have started shipping 3D printers with preinstalled, modified versions of Klipper. These modifications are often made to: Support for the specific hardware configuration. Provide customized features or interfaces. Integrate OEM-specific tools and UI elements tailored to the device. While these preinstalled versions can provide a more seam…