Maybe someone here will help:
http://appliancejunk.com/forums/index.php?board=5.0

Seems that CL code is not "faulty" code, there isn't much on web to go by other than trying to push some buttons up to 5 seconds before calling for service.
Now Cl code on dryer is another story-communication error between boards. Replace both display board and control board. I learn something every day.
http://needapplianceparts.com/lgapplianceserrorcodes.aspx

Good luck!!!

Press and hold the PRE-WASH/*Child Lock for 3 seconds
(not during Pause)

OR turn power OFF

LG WM2487WHM Owners Manual

If worst comes to worst you can try unplugging it for a couple hours and see if it resets the internal computer. Works for my Frigi Affinity.

I just had it happen to my Lg wm2140cw model. All I had to do was press and hold the OPTION button for 3 seconds and it resets it.

Good luck with this info!

My friend was about to buy a new washer and had me looking for one for around 7-800 dollars because she claimed it was broke and only "CL" was showing. I typed in what does CL mean on a washing machine, saw the above, pushed the Tub Clean for about 10 seconds (three did not work), and PRESTO!! it all started again. Thanx for the info ...

I had a similar issue. On my machine, you have to press the "wrinkle care" button for 3 seconds, as it doubles as the child lock button.

The washing machine displays cl but there is no cl button

i can’t open the tub

clothes are stucked up inside de

hiw do i remove the cl when there are s no buttoon help pls

Solved! I pressed together rinse and spin. And it worked on this model

thank u

Hey same problem but I fixed. There is small lock icon. Press and hold for 5 second, everything will be fine.

Turns out the child lock indicator is broken on our machine and is now always lit up, which is what confused us until I figured it out. Now, the only way to know if the child lock is active or not is by pressing a button and see if it activates or responds with CL. If it responds with CL, then we unlock it with the 3-second press-and-hold of the two buttons that are indicated by the smiling lock icon.

I can't find child lock to unlock

HU-677686907,

Greetings to you. I also can't find the child lock function on your machine. You didn't cite the model number so I am unable to research the details.