ianders wrote:
In my mind hertz would mean fan speed rather than temperature, which coincides with what you're saying with tapping the up arrow. Would imagine you'd be able to set both temp and fan speed separately so it's just working out how to switch between them.
Maybe I didn’t explain well in my original answer ?
That is fixed temperature mode , the bigger the number the hotter it gets , it just runs at that hotness no matter what the room ( vehicle interior) temperature is
What it is displaying is the pump and fan speed , they both increase together as you increase the number
To switch to thermostat mode you need to press the up arrow and the setting button and it switches to a temperature display
Press the 2 top buttons, hold left and then press right
You can alter the pump speed and fan speed parameters from within the settings , it needs a password first and I don’t recommend you fiddle with it