Display shows H1 or flashes a high temperature warning; interior is warm.

Safety: No internal electrical work is required for basic checks, but unplug the unit if you remove panels.

• Check door closure: Ensure the door is fully closing and the gasket is making uniform contact around the frame. Remove any bottles preventing closure.
• Inspect air circulation: Verify that interior vents (usually at the back) are not blocked by bottles. Rearrange contents to allow airflow.
• Verify ambient conditions: hOmeLabs wine coolers are designed for indoor use. If placed in a hot garage or near an oven, the unit may struggle to cool and trigger H1.
• Listen for compressor and fan: With the unit powered, confirm that the compressor and interior fan are running. If silent, there may be a separate fault (relay, fan, or board).
• Allow recovery time: After loading many warm bottles, the temperature will rise. Allow 12–24 hours for the cooler to pull down to set temperature.
• Sensor check: If the interior feels cool but H1 persists, the temperature sensor may be misreading. Refer to E1/E2/E3 procedures to test and replace the appropriate sensor.

Call a technician if: The compressor runs continuously for more than 24 hours without cooling, indicating a sealed-system issue (refrigerant leak, restriction, or weak compressor).