Hi @stuk
There's no reset button as such on the ice maker, only an On/Off switch.
If you haven't already done so, try turning it off, check that the ice bin is empty, wait a few minutes and then turn it on again and see if it now works OK.
Here's an image from the [https://www.lg.com/ca_en/support/product/lg-LFXS28566S|user manual] (see p.32 onwards) that shows where it is located.
[image|3013618]
If still no good, here's the [document|30330|service manual] see p.93-p.95 for how to troubleshoot the ice maker.