I've helped my son put together the Cargo Train set (60052) but now we can't get the remote control to work.
It all looks like it's been assembled correctly with new batteries put in, but it doesn't move.
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The best way to solve this type of problem is to break it down and isolate the fault.
You might find that it is easier to remove the Power Functions components from the model for some of the following:
Remote / IR Reciever Problems
If the problem is with the controller / IR receiver:
Battery Box / Motor Problems
Check the batteries in the battery box, following steps 3-5 above. The little green light should come on when they're OK and the battery box is switched on (the green button is the on-off switch).
There is a great description of the battery box on the LEGO web site, which might help explain things better than I can. This picture is from that site:
If All Else Fails
Contact LEGO customer services. They'll be deligted to help.
I just got two new 8885 remotes. Neither was working. Turns out in my case the plus terminals and the plus side of the batteries were not touching due to the terminals being kept too far away by the plastic housing. I bend the terminals a little by inserting a small screw driver behind them and now it works as a charm. Better to take batteries out when actually doing it not as shown on photo with batteries in it :-)
Bit of bad production.
We have the same problem as outlined above. We realised that the cheap AAA batteries we bought did not make contact with the positive end of the terminals in the controller. In other words the bumpy bit at the positive end of the battery is not high enough to make contact inside the controller. Solution - buy better quality AAA batteries. They will make proper contact.
We have had exactly the same issues with the remote control. We found that by checking the batteries were in correctly and rolling them once inside the unit to ensure good connection worked and the green light came on as well as the light on the reciever. The batteries fit with the outer 2 going one way and the inner one going the other as instructed. Hope this helps
So just bought a brand new LEGO Technic kit number 420030. Both IR remotes do not work when loaded with fresh batteries.
I just got off the phone with LEGO tech support on this and here's the information they provided. DURACELL batteries are the culprit as they're too short (that's per LEGO tech support).
I beg to differ however as I have side by side remotes (I have a third older remote from a previous kit) both loaded with Duracell and one working one not and the condition remains THE SAME even when I swap the batteries.
THIS IS A BAD BUILD ON LEGO'S PART. THEIR TOLERANCES HAVE NOT BEEN CONTROLLED. Applying the manipulation to the positive post on both controllers as detailed above fixed the problem on each.
BOO LEGO own your issues!