I have the Big Boy with the lowering coal load.
It has run fine until today.
It no longer goes down.
I did reprogram the loco several times.
All other features work correctly.
I also tried the demonstration mode and it did not work, although the sounds worked.
When I do the "refill" for coal, the sound works but since the coal load is at maximum level, it does not rise.
Any ideas as to what to look at?