LG Microwave error code
LG Microwave Error F4
This indicates a humidity sensor fault.
This indicates a humidity sensor fault.
Try these first
Start here before buying a part or taking the appliance apart.
- 1Step 1
Unplug the microwave for one minute and then plug it back in.
- 2Stop and arrange professional service
If the error code returns after a full power reset, stop DIY internal work. Microwave internal components can retain hazardous voltage even after unplugging. Internal diagnosis and repair should be handled by a qualified technician.
A quick explanation
What does F4 mean?
This indicates a humidity sensor fault.
The answer you came for
How to fix LG microwave error F4
Start with the safest checks and work from simple to technical.
Microwave internal components can retain hazardous voltage even after unplugging. The steps below are limited to safe external checks. Internal diagnosis and repair should be handled by a qualified professional.
- 1
Step 1
Unplug the microwave for one minute and then plug it back in.
- 2
Stop and arrange professional service
If the error code returns after a full power reset, stop DIY internal work. Microwave internal components can retain hazardous voltage even after unplugging. Internal diagnosis and repair should be handled by a qualified technician.
What you should see: You avoid opening the cabinet or touching internal high-voltage parts.
What may be causing it?
- Faulty humidity sensor
These are possibilities to investigate, not proof that one part has failed.
Recommended part
Possible technician-diagnosed component
Humidity Sensor: 6501W1A013A
Price noted in the current guide: $50-$65
Why this part is shown: A technician may identify Humidity Sensor: 6501W1A013A on some LG microwave models after diagnosis. This is not a DIY installation guide.
Do not open the microwave cabinet or attempt internal replacement. Confirm model compatibility with a qualified technician before any purchase.
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Safety first
Unplug the microwave before any checks. Do not remove the cabinet or touch internal components.
When to stop
- Microwave internal components can retain hazardous voltage even after unplugging. Internal diagnosis and repair require a qualified technician.
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