ErrorCodeDoctor
Panasonic Microwave Child Lock / Key Symbol / LOCK error code
The child lock indicator — shown as a key symbol, the word LOCK, or the word Child on the display — is not an error code. It means the child safety lock feature has been activated, which disables all the control panel buttons to prevent accidental or unauthorised use. The door will still open but the microwave will not start. The exact method to deactivate child lock varies by model.
Common causes
- Child lock was intentionally activated to prevent accidental use
- Child lock buttons were accidentally pressed activating the feature
How to fix it
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1
Method 1: Press Function, then press 5 to select CHILD LOCK ON/OFF, then press 2 to select CHILD LOCK OFF
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2
Method 2 (Models NN-ST27HB, NN-ST27HW, NN-SE284): Tap the Stop/Reset key 3 times — the display returns to colon or time when child lock is cancelled
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3
Method 3 (most models): Press Start or Start/Set 3 times within 10 seconds to toggle child lock on or off
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4
Check your owner's manual for the exact method for your specific model
Related Panasonic Microwave error codes
Cooling
The cooling fan is running to cool down the internal components — not an error
D
Demo Mode is active — the microwave will not heat
E01
An internal fault was detected — the microwave requires service
E05
An internal fault was detected — the microwave requires service
Child Lock / Key Symbol / LOCK error — frequently asked questions
What does the Child Lock / Key Symbol / LOCK error mean on a Panasonic microwave?
Child lock is active — the control panel is disabled
What causes the Child Lock / Key Symbol / LOCK error?
The Child Lock / Key Symbol / LOCK error is usually caused by: Child lock was intentionally activated to prevent accidental use; Child lock buttons were accidentally pressed activating the feature.
Can I fix the Child Lock / Key Symbol / LOCK error myself?
Yes — this is rated an easy fix that most people can do themselves, typically in 1m.
How much does it cost to fix the Child Lock / Key Symbol / LOCK error?
Fixing the Child Lock / Key Symbol / LOCK error on a Panasonic microwave typically costs $0, depending on parts and whether you do it yourself or hire a technician.
Is it safe to keep using my microwave with the Child Lock / Key Symbol / LOCK error?
In most cases yes, but it's best to address the Child Lock / Key Symbol / LOCK error soon — see the fix steps below to resolve it.