11 minutes ago, Ray Proudfoot said:

No idea I’m afraid. I would guess 18-25 Celsius 

25°C would be definitely too low. E.g. on the 767, 777 etc. the upper limit in auto mode is 30°C.  

6 minutes ago, J35OE said:

25°C would be definitely too low. E.g. on the 767, 777 etc. the upper limit in auto mode is 30°C.  

That seems very high. Maybe the pressurised air makes a higher temp necessary. Anyway, I thought you were going to tell me the PC12 range.

1 minute ago, Ray Proudfoot said:

 Anyway, I thought you were going to tell me the PC12 range.

18-30

Btw, the bleed air temperature on the PC-12 can get as high as 290°C and at the primary shutoff valve still more than 100°C, so in manual the range might be a tad higher.

3 minutes ago, J35OE said:

18-30

Ta. I wasn't a million miles out. Can the code be hacked and corrected?

42 minutes ago, Ray Proudfoot said:

Ta. I wasn't a million miles out. Can the code be hacked and corrected?

Turning off Tooltips will take care of it 

9 minutes ago, Bert Pieke said:

Turning off Tooltips will take care of it 

+1

A better "real world" solution...

The 0-100 readout is simply 0-100% of the knob range.

Get a piece of graph paper...

0-100 in 10 increments on the X axis

18-30 degrees C on the Y axis.

Draw the graph, and stick the graph to the edge of your computer monitor

for reference when flying 

But despite the setting I make the displayed temp doesn’t change from 23. You all see the same?

AH.. that is different..

Here is the section in the actual POH:

The Temperature Control System has two modes of operation as selected on the
Auto/Manual switch. In the Auto mode, TCV operation is controlled by electrical signals
from a cabin temperature sensor, located on the cabin headliner, to maintain the
selected temperature between 18°C and 30°C. The TCV will move to allow more bleed
air to bypass the Cooling Turbine if the cabin temperature is less than desired.
Conversely it will move to pass more air through the Heat Exchanger and Cooling
Turbine if the temperature is greater than desired.
The temperature of the duct downstream is monitored by a temperature sensor and will
limit the movement of the TCV as required to keep the duct temperature within the
maximum and minimum temperature limits. In the Manual mode, a separate switch
marked HOT and COLD directly controls the position of the TCV.
CAUTION
WHEN OPERATING IN THE MANUAL MODE THE
SYSTEM MAXIMUM AND MINIMUM TEMPERATURE
LIMITS ARE DISABLED AND THERE IS A
POSSIBILITY OF DAMAGING THE SYSTEM BY
SETTING OUTLET TEMPERATURES OUTSIDE
THESE LIMITS. THE MANUAL MODE SHOULD
THEREFORE ONLY BE USED WHEN IT IS NOT
POSSIBLE TO CONTROL THE ECS AIR OUTLET
TEMPERATURE USING THE AUTOMATIC MODE.
From the mixing duct the conditioned air passes through a water separator. Moisture is
removed from the conditioned air and drawn to the heat exchanger and sprayed into the
heat exchanger intake. The conditioned air passes through the Firewall Shutoff Valve
and the non-return valves to the cabin for distribution. The non-return valves prevent
sudden depressurization in the event of a loss of cabin air supply.
The air enters a small plenum where it is distributed to the cockpit and the cabin.
Cockpit air is directed to adjustable outlets at the crews feet and adjustable outlets
adjacent to the instrument panel. Air to the cabin is introduced through fixed outlets
placed at floor level along both sides of the cabin.
The ECS will automatically shut down when the engine starter is activated.
INDICATION/WARNING
Cabin air temperature is displayed on the center console forward of the engine power
controls.

And the corresponding code in the Carenado simulation:

<Element id="AIR_TEMP">
            <FloatPosition>100.000,60.000</FloatPosition>
            <Visibility>(A:CIRCUIT GENERAL PANEL ON, bool)</Visibility>
            <GaugeText id="AIR_TEMPT">
                <Bright>True</Bright>
                <FontColor>0x005AFF</FontColor>
                <FontFace>LCD_MONO</FontFace>
                <FontHeight>70</FontHeight>
                <GaugeString>23 C</GaugeString>
                <HorizontalAlign>RIGHT</HorizontalAlign>
                <Size>150,70</Size>
                <Transparent>True</Transparent>
            </GaugeText>
        </Element>

Crikey, thanks Bert. Where exactly do I paste that code?

No, that is the existing code... note the "23 C" 

If you can come up with a calculation, involving the outside temperature, the position of the knob, etc,  we could display any value there instead of the 23 C....

7 hours ago, Bert Pieke said:

No, that is the existing code... note the "23 C" 

If you can come up with a calculation, involving the outside temperature, the position of the knob, etc,  we could display any value there instead of the 23 C....

I suppose the obvious suggestion is to take the air temp from P3D itself. But this isn't really important to me. I was just curious why 23C couldn't be changed.

7 hours ago, Ray Proudfoot said:

I suppose the obvious suggestion is to take the air temp from P3D itself. But this isn't really important to me. I was just curious why 23C couldn't be changed.

OK, if you come up with a suggestion, let me know!

The P3D air temperature is the outside air temperature... probably don't want that at altitude..

could be chilly..