Sky Cheif N Scale Engine

[JMOlshefski]

This is my second set, the Sky Chief N-Scale Engine seems to be frozen, the light come on and I can feel vibration but train does not move, any recommendtions?

Thanks

[Flare]

The usual reason for what you described is accidentally connecting the tracks to accessory power terminals on the controller.

Do you have another locomotive or controller you can test with?

[JMOlshefski]

I tried a second controller and that worked then swapped back to original controller and that worked.?  Unrelated follow up question, what is tnn repurpose of the Rapio couplers included in each set,

[Flare]

The rapido couplers are probably for compatibility with older trains.