The original post was from a month ago. You may have to take the dash benzil off, take the heater contol out, and check if you can see if the selector lever is engaged with the sliding switch on "box". If you can't see, two small screws will take it off, and you can check if it has been engaged on the selector lever. Place both the switch and selector in the same position, and re-assemble.
To remove the benzil, I found if you pull the top back, and then squeeze & pull the bottom, it should come off. Take the ash tray out first.