I always get confused by the icons on my vacuum cleaner pedal.
Is that icon representing
1) The tool. I.e. "Your now using the pedal without the brush" (ergo, on a rug)
2) The target. I.e. "You can now use the pedal on a flat floor" (ergo, with the brush)
Actually, the icons aren't the main problem here. The lower icon clarifies a bit, so I can imagine what they are representing, but I think I ask myself "Is the brush in or out" just before I take a glance at the pedal. So my mental model wants the switch to indicate the status of the tool I'm using. Yet the tool is actually showing me the target where the tool should be used.
Do I (and my mental model) belong to the minority here? Is this a deliberate design decision based on user research? How could this have been solved to remove all ambiguity?