Display shows H1 and the cabinet temperature reading is extremely high or flashing; unit may shut down cooling.

Safety first: Do not store valuable wine in a unit that cannot maintain temperature. Unplug before internal inspections.

• Check door and gasket: Ensure the door is fully closing and the gasket is clean and undamaged. Look for gaps, warped door, or items blocking closure.
• Verify ventilation: Confirm that front or rear vents are not blocked and that the cooler has proper clearance. Clean dust from the condenser grille.
• Listen for compressor and fans: With the unit plugged in, verify that the compressor and both fans (evaporator and condenser) are running. If they are not, refer to compressor or fan fault scenarios.
• Allow recovery time: If the door was left open or the unit was recently loaded with warm bottles, allow 12–24 hours for temperature to stabilize. The H1 alarm may clear automatically.
• Check temperature sensor: If the interior feels cool but the display shows very high temperature, the cabinet sensor may be faulty. Inspect and replace the "Cabinet temperature sensor" as described in the E1 scenario.
• Seek professional help if no cooling: If the compressor runs but the cabinet does not cool after several hours, the sealed refrigeration system may have a leak or restriction, requiring a certified technician.