How to make SRT321/HRT4 stay at setting made in the console?

Hello,
In the dashboard I can drag the circular dial for my SRT321/HRT4’s temp up/down and press the -/+ buttons which does alter the setpoint displayed in the console, but it never stays at the new setting and reverts back to the previous values when the screen is refreshed. It’s almost like forgetting to press the Apply button in Windows. The dashboard does change if I manually move the device’s dial, but ideally I’d like to change the device set temp through the console. Any ideas what I should be doing as I’m fairly new to this?

Thanks!
Dave