LG · Microwave Minor

CH — / Child Lock — Control locked

Not a failure — the child lock is engaged. Keypad will not accept inputs other than the unlock combination.

Keep using it?
Yes — fix when convenient
DIY difficulty
Easy
Verified against
lg.com ↗

How to fix it

  1. Press and hold 'Stop/Clear' (or 'Clear') for 3 seconds — the most common unlock on LG.
  2. On some models, press and hold '3' for 3 seconds.
  3. Check the owner's manual for your specific model's combination if neither works.
  4. Once unlocked, run a quick 10-second test cycle to confirm.

Why it happens

Typical signs: 'CH', 'L', or a padlock icon on display · Beep when any cook button is pressed · Time-of-day can be displayed but cycles won't start

  • Child lock turned on User or a curious child activated the lock.
  • Power glitch toggled lock Less common; can occur after brownouts.

More LG microwave codes

DOOR DOOR / Door Error — Door switch / interlock fault F-1 F-1 — Main Control Board Fault F-2 F-2 — Keypad / touch panel shorted F-3 F-3 — Key short / specific button stuck F-4 F-4 — Humidity / steam sensor fault F-5 F-5 — Magnetron / high-voltage circuit error

All LG codes → All microwave codes →

Always unplug an appliance before servicing it. This guide is for informational purposes and is not a substitute for a qualified technician. Verified against manufacturer documentation: lg.com.