I found this picture of my Chrysler Neon's heater control panel. You are correct in that I removed the panel with the ***** on and behind I was able to identify a switch that activated the A/C when the 3rd **** was turned to demist. I simply cut the copper track to this switch to disable it. I don't know if your Voyager has a similar control panel, if it does there is a good chance you could do what I did!

 

Thanks booke23 !!! It looks a bit different in my car, but I will have another look....

@ dcotter0579: Many thanks for your reply. I understand that the heating can override the aircon in terms of temperature, but my point is that the compressor is running and takes up gas. I have three dogs, so the screen is more or less constantly slightly misted in the cold and intermediate seasons... usually a bit of airflow did the job in my previous cars. Having the compressor constantly running when I just want some airflow to my screen does not make much sense considering the current gas prices (at least i Germany) and the impact to the environment.

Cheers,

Th