Freezer shows E20 and may emit a continuous alarm tone; temperature may be too high.

Safety: No internal electrical work is required for basic checks, but unplug the freezer before removing panels.

• 1. Check door closure: Ensure the door closes fully and the gasket contacts the cabinet all around. Remove any items blocking closure.
• 2. Inspect door gasket: Look for tears, gaps, or hardened sections. Warm the gasket with a hair dryer and reshape if slightly deformed.
• 3. Consider recent usage: If you recently loaded large quantities of unfrozen food, allow 12–24 hours for temperature to stabilize. E20 may clear automatically.
• 4. Listen for compressor and fan: Confirm that the compressor and internal fan (on no-frost models) are running. If silent, investigate power, control, or compressor faults.
• 5. Check for frost buildup: Remove drawers and inspect the rear panel for thick ice. If present, perform a full manual defrost and then monitor operation.
• 6. Reset alarm: Use the alarm reset button (if provided) after temperature has dropped back into the safe range.

Important: If E20 persists despite good door sealing and normal operation sounds, there may be a sealed-system issue (e.g., refrigerant leak) requiring a refrigeration technician.