# IHC-200 HD cannot be set less than 10

**URL:** <https://community.inkbird.com/t/ihc-200-hd-cannot-be-set-less-than-10/507>\
**Category:** Uncategorized\
**Created:** [April 26, 2022, 5:14pm UTC](https://community.inkbird.com/t/ihc-200-hd-cannot-be-set-less-than-10/507 "2022-04-26T17:14:10Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![cbuchman](https://avatars.discourse-cdn.com/v4/letter/c/82dd89/32.png) [@cbuchman](https://community.inkbird.com/u/cbuchman)\
**Post date:** [April 26, 2022, 5:14pm UTC](https://community.inkbird.com/t/ihc-200-hd-cannot-be-set-less-than-10/507/1 "2022-04-26T17:14:10Z")

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Suddenly today, my unit is not functional properly. I use it to run a fogger in an orchidarium and have successfully been maintaining the humidity between 88 and 90% until today… I believe the issue is that I cannot set the HD (Humidification Differential) to anything less than 10. The manual says I should be able to choose a value between 1 and 20.

My current settings are: HS - 90; HD - 10 (cannot be set lower); DD - 10; AH - 99; AL - 0; PT - 0; CA - 0.

Am I correct that the issue is the HD and how can I get it to set lower than 10?

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**Author:** ![Tania](https://yyz1.discourse-cdn.com/flex031/user_avatar/community.inkbird.com/tania/32/88_2.png) [@Tania](https://community.inkbird.com/u/Tania)\
**Post date:** [April 27, 2022, 8:04am UTC](https://community.inkbird.com/t/ihc-200-hd-cannot-be-set-less-than-10/507/2 "2022-04-27T08:04:05Z")

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Hello,  
If you press and hold the SET button, could you enter the setting mode?  
If you switch to HD and press the up/down button, can its value be changed? Its setting range is 10%~20%?  
Is there possible to take a video of this problem and send it to [support@inkbird.com](mailto:support@inkbird.com)?  
Thanks.