ok, after your post, I checked again and I remembered that someone had a prior problem with similar remote in that it showed C vice F and had to press the on button and + button at the same time.
so I turned a/c off and then turned on unit pressing on button and + same time, and there in display it was "lo", "high", and "au" (auto). geez haha, well the unit went off as it is at the set temp now.
thanks for your post that jump started me.
bill & jodi