Er
LG
General Control System Error
LG air fryer shows a generic Er or Err message and beeps, refusing to start.
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Safety Warning
This repair may involve working with high voltage components or water connections. Always unplug the appliance before removing any panels.
If you are not confident in your ability to perform this repair safely, we strongly recommend contacting a professional technician.
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Possible Causes
Firmware glitch, Corrupted control settings, Loose ribbon cable between display and main PCB, Failing main control board
How to Fix / Troubleshooting
Safety first: Unplug the unit before opening any panels.
Steps to clear Er/Err:
- Control reset: Unplug the air fryer for at least 10 minutes. Press and hold the main power or start button for 10 seconds while unplugged to discharge residual power, then reconnect and test.
- Check control panel: Inspect the front control panel for moisture, spills, or stuck buttons. Wipe with a slightly damp cloth and dry thoroughly.
- Inspect ribbon cable: Remove the control panel bezel and verify the ribbon cable between the display board and main PCB is fully seated and not damaged.
- Re-test: Reassemble and power on. If the error persists, the main control board or display board may need replacement.
Note: Board replacement should be done with LG-approved parts to maintain safety and compatibility.
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Repair Difficulty
Hard
4/5
Required Part
Main Control Board
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