All it does is to move the red illuminated bar below (HOT) on the climate contol up one notch.
The switch was in the middle position when I started and the climate control looked like this:
After moving the switch to the right, the red illuminated bar below (HOT) on the climate contol moved up one notch.
Like this:
As you can see the little red bar is now at the top.
Appears to be a setting for the heat level?? or something?
When I moved the switch to the left it did not appear any different, although it still made an electronic buzzing sound...so something was happening.
I tried moving the switch several times, and the above is what happened in all cases...