# Special Temperature Control
**URL:** https://community.inkbird.com/t/special-temperature-control/859
**Category:** Questions & Answers
**Created:** [September 23, 2022, 1:15am UTC](https://community.inkbird.com/t/special-temperature-control/859 "2022-09-23T01:15:32Z")
**Posts on this page:** 2
**Page:** 1
### Author:  [@Ryand33](https://community.inkbird.com/u/Ryand33)
#### Post date: [September 23, 2022, 1:15am UTC](https://community.inkbird.com/t/special-temperature-control/859/1 "2022-09-23T01:15:32Z")
What is the purpose of this? If i change a setting i expect the device adhere to that new setting immediately. But it doesnt because of this.
WHY!?
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### Author:  [@Tania](https://community.inkbird.com/u/Tania)
#### Post date: [September 23, 2022, 11:21am UTC](https://community.inkbird.com/t/special-temperature-control/859/2 "2022-09-23T11:21:09Z")
Hello,
Sorry for the inconvenience caused.
This function is designed to quickly test whether the output can reach the target value after completing the setting.
After reaching the target value, it will go into normal mode.
Please refer to this post:
> [@Q&A: How does ITC-308WIFI work?](https://community.inkbird.com/t/q-a-how-does-itc-308wifi-work/151):
>
> ITC-308WIFI has a special temperature mode and a normal temperature mode. The trigger conditions for the special temperature mode are: Enter the setting mode through the SET key then exit. Enter the setting mode through the app then exit. In the special temperature mode, ITC-308WIFI will ignore the settings of HD (Heating hysteresis temperature) and CD (Cooling back temperature) and turn on the heating/cooling output. It will not enter the normal mode until the temperature reaches the SV tar…