Er

AEG Generic Error / Control Self-Diagnosis Failure

Display shows Er or Err and controls may be locked or unresponsive

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.

Possible Causes

Firmware glitch, Power surge, Internal memory error on PCB, Multiple sensor faults detected simultaneously

How to Fix / Troubleshooting

Safety: Disconnect mains power before any disassembly.

Steps:

1. Hard reset: Unplug the freezer for at least 15 minutes, then reconnect. Observe if Er clears.
2. Check for other codes: Some AEG models cycle through more specific codes after Er. Note any additional codes for targeted diagnosis.
3. Inspect PCB: Look for obvious damage or corrosion. Ensure all connectors are firmly seated.
4. Surge protection: If power quality is poor, consider using a surge-protected outlet after repair.

If Er persists, the main control PCB likely requires replacement by a qualified technician.

Repair Difficulty

Hard 4/5

Required Part

Main Control PCB

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