H1 or HI displayed with an audible alarm; freezer interior is too warm and food may be thawing.
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
How to Fix / Troubleshooting
Safety: No internal electrical work is required for basic checks, but unplug the freezer if you remove panels.
Immediate actions:
- 1. Check door: Ensure the door is fully closed and the gasket is sealing all around. Remove any items obstructing closure.
- 2. Allow recovery: If you recently loaded a large quantity of warm food or had a power cut, allow 12–24 hours for the temperature to recover. Use fast-freeze mode if available.
- 3. Listen for compressor: Confirm the compressor is running (a low humming sound and slight vibration). If silent and H1 persists, investigate the compressor start device and PCB.
- 4. Check for frost pattern: If accessible, remove the internal rear panel and inspect the evaporator. A partial frost pattern (only at the inlet) may indicate a refrigerant issue.
- 5. Seal and ventilation: Ensure the freezer has adequate ventilation around the condenser and that the condenser is not clogged with dust.
When to call a technician: If the compressor runs continuously but the freezer does not cool, or if you suspect a refrigerant leak, a refrigeration engineer is required.