Motorola 80FLIWBM5DG User Manual page 30

So the door can't be opened and the button except power button can't be
handled. When cancel this function, door can be opened again.
Set/Cancel method
Open the power and press "Temp" button for 3 seconds till the buzzer
sound. The child lock function is finished to set. If repeat this action, the
child lock function will be cancelled.
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