E20 displayed; refrigerator may not cool properly; compressor may run continuously or not at all.

Safety: Unplug the refrigerator. Do not attempt to open the sealed system unless you are a licensed refrigeration technician.

E20 indicates that the control detects poor cooling performance not explained by sensors alone.

• Basic checks: Confirm doors close properly, gaskets seal, and ventilation around the fridge is adequate. Clean condenser coils.
• Temperature test: Place thermometers in fridge and freezer and monitor over several hours. If temperatures remain high despite long compressor run times, a sealed system issue is likely.
• Frost pattern: Remove the freezer rear panel and inspect the evaporator. A small patch of frost only near the inlet suggests low refrigerant or blockage.
• Call a professional: Sealed system repairs (leak detection, recharging, compressor replacement) require specialized tools and must be performed by a qualified technician.