42131 m9del m9ves ok but cannot control the blade angle, ladder or scoop

[Colin42]

Built according to the manuals. But I cannot control the blade direction, scoop or ladder. Where to start looking 

[Timorzelorzworz]

Why your "o" is a 9? Maybe some glitch in the Matrix happend.

[anyUser]

Hi,
we had some questions on troubleshootings in the past:

Is there anything similar to your model?

[Lego Tom]

Not trying to sound like a smart a$$ but if it's not working, it's not built right. Did you do the "checks" along the build? Look through the thread that anyUser posted and see if anything looks similar. 

[Zerobricks]

Agreed, not to sound rude either but if you build as well as you type, then the issue has to be in the model. I recommend rebuilding the gearbox. 

[williamyzfr1]

I had a lot of trouble getting my 42131 to initially calibrate & any request to recalibrate since doesnt work but it continues to function as intended. 

Did it ever calibrate?

Probably not based on your description, so I would suspect the gearbox build as that (if I remember correctly) controls/changes the different functions.

Edited November 14, 2025 by williamyzfr1