Exhaust fan is enabled / runs at 80% despite being disabled #1748

New Issue

MrUnknownDE · 2026-04-05T19:33:17+02:00

MrUnknownDE commented

2026-04-05 19:33:17 +02:00

Originally created by @Fuzzyl0g1x on 11/1/2025

Is there an existing issue for this problem?

I have searched the existing issues

OrcaSlicer Version

v2.3.2-dev

Operating System (OS)

Windows

OS Version

Windows 10

Additional system information

No response

Printer

Bambu P1S

How to reproduce

In profiles where the exhaust fan is disabled, the exhaust fan is enabled and runs at 80%. I suspect that this is something to do with H2D support being added, but not yet confirmed.

This bug results in some Bambu printers being obnoxiously loud, since the X1C/P1S exhaust fan is a high static pressure / high noise model.

Actual results

Print anything with the exhaust fan disabled, and watch Orca ignore that setting.

Expected results

Orca should respect the user's cooling fan settings, including disabling the exhaust fan.

Project file & Debug log uploads

N/A

Checklist of files to include

Log file
Project file

Anything else?

No response

*Originally created by @Fuzzyl0g1x on 11/1/2025* ### Is there an existing issue for this problem? - [x] I have searched the existing issues ### OrcaSlicer Version v2.3.2-dev ### Operating System (OS) Windows ### OS Version Windows 10 ### Additional system information _No response_ ### Printer Bambu P1S ### How to reproduce In profiles where the exhaust fan is disabled, the exhaust fan is enabled and runs at 80%. I suspect that this is something to do with H2D support being added, but not yet confirmed. This bug results in some Bambu printers being obnoxiously loud, since the X1C/P1S exhaust fan is a high static pressure / high noise model. <img width="1245" height="830" alt="Image" src="https://github.com/user-attachments/assets/4169e3a1-46ec-4aec-84ac-0ff67bf4d726" /> <img width="1401" height="991" alt="Image" src="https://github.com/user-attachments/assets/c024e27b-ad31-440b-a21c-29094b857e8d" /> ### Actual results Print anything with the exhaust fan disabled, and watch Orca ignore that setting. ### Expected results Orca should respect the user's cooling fan settings, including disabling the exhaust fan. ### Project file & Debug log uploads N/A ### Checklist of files to include - [ ] Log file - [ ] Project file ### Anything else? _No response_

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Reference: github/OrcaSlicer#1748