Temperature control knob not working

2005 TOYOTA SEQUOIA
200,000 MILES • V8 • 2WD • AUTOMATIC
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BNOBLE
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The knob that controls temperature is no longer working. It is stuck at 81 degrees. All other A/C controls work. I assume A/C works but since the knob is stuck on heat... I'm not sure.
Feb 2, 2022 at 4:41 PM
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KASEKENNY
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More than likely you are going to have to replace the control assembly.

This was a component that was common to fail.

I am attaching the info that we need to confirm this.

Basically, to confirm this we need to check the voltage when you are turning the temperature knob going to the actuator.

https://www.2carpros.com/articles/how-to-check-wiring

However, if the display never changes then the issue is with the control assembly.

I am attaching the info below so please run through this and let me know what questions you have. Thanks
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Feb 3, 2022 at 3:30 PM