This is in the ORG Boards. Somebody has a Williams tender where the whistle keeps going off without touching a whistle button.
I have a separate tender which does the same thing.
I do know a tender going over a swith could cause it to see DC and "blow". How about dirty track?
Also, how about a spst switch for the whistle so you can cut it out?
I just upated on that, go read. Thanks