# Face missing

**URL:** <https://www.simscale.com/forum/t/face-missing/98631>\
**Category:** CAD Mode Support\
**Created:** [June 30, 2024, 4:07pm UTC](https://www.simscale.com/forum/t/face-missing/98631 "2024-06-30T16:07:49Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![Wiphu](https://www.simscale.com/forum/letter_avatar/wiphu/32/5_5575768a8748004e209b776fc1b2916d.png) [@Wiphu](https://www.simscale.com/forum/u/Wiphu)\
**Post date:** [June 30, 2024, 4:07pm UTC](https://www.simscale.com/forum/t/face-missing/98631/1 "2024-06-30T16:07:49Z")

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I am preparing my CAD model for simulation. While deleting a face in CAD mode, the side diffuser also went missing. How can I prevent this issue and ensure the side diffuser remains intact?

 ![image](https://www.simscale.com/forum/uploads/default/original/3X/a/9/a9c9357c5b8a754a739052f5b601bd38eab73a20.png)  
 ![image](https://www.simscale.com/forum/uploads/default/original/3X/c/d/cdc445a808ca978e026ac27e2955b4a3f423db2a.png)

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**Author:** ![RicardoParis](https://www.simscale.com/forum/user_avatar/www.simscale.com/ricardoparis/32/30222_2.png) [@RicardoParis](https://www.simscale.com/forum/u/RicardoParis)\
**Post date:** [July 1, 2024, 6:59pm UTC](https://www.simscale.com/forum/t/face-missing/98631/2 "2024-07-01T18:59:42Z")

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Hello,

It’s very difficult to tell just from looking at these two images. Make sure to post a project link as well.

Cheers