MTH Premier AC-4400 Diesel stopped working with DCS Commander..

Check the menus, see if Recover engine is there. Use it if it is.

If not, You can try a Factory Reset.

DC Commander so no recover engine.  Can you test loco in conventional to see if it works?  With no click sounds like a problem with the engine.  I would check all the switches and if they are in the right place, back to the shop.  G

The only option I have on the DCS Commander is a Reset button. When I follow Barry's book it only shows a flashing "System" and nothing else on the LCD weh I push and hold this button.

I'm hoping I don't need the full DCS to get this loco running again?

Thanks!

It's not working in conventional either. The shop just sent it back to me and they said it ran perfectly there.

Not much I can do wrong with the DCS Commander right? The track has voltage and I've followed all instructions...

Hate to say it but I think I'm disappointed with the DCS Commander and the MTH loco. I may have to rethink things and go with Digitrax which I used for over a decade on my HO layout.

Too much time so far being spent without a loco to run trains.

Just take the engine to someplace with the full DCS and have it reset.

This is not the remote commander, he has the DCS Commander which has DCS and DC power out.   So he can add engines with addresses.

If the engine is not running in conventional, and no relay click...something is wrong with engine.  I would go back to the shop and ask what they did, and show that it runs in conventional and on DCS on there layout.  G

In that case George, I wonder why the factory reset doesn't work, that should restore the locomotive to be able to run in conventional, right?

OK, noticed no one asked this:

Take a volt meter or a lighted car, place on the track.

See if you are getting power to the rails.

It is possible something got disconnected while the engine was away for repair.

That would give the no click, no response symptom.

Also, the shop may have set it to 3 rail for testing, make sure the switches are set to 2 rail and DCS (not DCC)(assuming PS3 there)

I told him to check his switches.

John, It sounds like something changed as it is not being recognized by DCS Commander, he gets an error message, and now the engine doesn't even click the relay or operate in conventional.

If the switches are in correct positions and the power is available for the rails, not sure why the engine won't run unless there is a problem with the engine.  G