H1 is displayed and the freezer stops cooling; the compressor may be locked out.

Safety first: Unplug the freezer before cleaning or accessing the rear compartment.

• 1. Improve ventilation: Ensure the freezer is not installed flush against a wall or in a confined cabinet. Provide at least the manufacturer-recommended clearance around the unit.
• 2. Clean condenser: Remove the rear lower panel if necessary and gently clean dust and lint from the condenser coils and any condenser fan using a soft brush and vacuum.
• 3. Check condenser fan (if present): Verify that the fan spins freely by hand. After reapplying power (for testing only), confirm that it runs when the compressor is on. Replace the fan motor if it does not run with proper voltage.
• 4. Allow cool-down: Leave the freezer unplugged for 30–60 minutes to allow the compressor to cool. Then restore power and see if H1 clears.
• 5. Monitor operation: If H1 recurs despite good airflow and a working fan, the compressor may be overheating due to internal faults or refrigerant issues, which require a professional refrigeration technician.