H1 or HI appears on the display and an alarm sounds; interior temperature is above safe freezing level.

Safety: Check food safety. If items have thawed significantly, discard per food safety guidelines.

Steps:

• Confirm door closure: Make sure nothing is blocking the door from closing fully (e.g., protruding food packages or shelves).
• Inspect gasket: Run a thin strip of paper around the door seal; if it pulls out easily anywhere, the gasket may not be sealing. Clean the gasket and door frame. Replace the door gasket if torn or deformed.
• Allow pull-down time: If you just loaded a large quantity of unfrozen food, the alarm is normal. Allow 12–24 hours for temperature to stabilize.
• Check compressor operation: Listen for the compressor running. If it is off for long periods while the interior is warm, there may be a control or compressor issue.
• Ventilation: Ensure the freezer has adequate clearance around the sides and back per Avanti installation instructions. Overheating can reduce cooling capacity.
• Professional service: If the unit runs continuously but cannot reach set temperature, a sealed system problem is likely and requires a technician.