Display shows H1 or HI; freezer interior is too warm and alarm may sound
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 first: No immediate electrical hazard, but avoid leaving the door open for long periods to protect food safety.
Steps to address H1/HI:
- Check door seal and usage: Ensure the door is fully closing and the gasket is sealing all around. Reduce door openings and allow several hours for temperature to recover after loading warm food.
- Verify set temperature: Confirm the setpoint is at the recommended freezer temperature (around -18°C / 0°F).
- Listen for compressor and fan: Ensure the compressor is running and that you can hear the evaporator fan when the door switch is pressed closed.
- Inspect for frost blockage: Heavy frost on the evaporator cover can restrict airflow. If present, fully defrost the unit by unplugging and leaving doors open until all ice melts, then restart.
- Monitor temperature: Place a freezer thermometer inside and check after 12–24 hours. If temperature remains high despite normal operation, there may be a sealed system issue (leak, restriction, weak compressor).
When to call a technician: If the compressor runs continuously but the freezer never reaches proper temperature, a sealed system diagnosis by a refrigeration technician is required.