Wine cooler displays H2 and the internal temperature is too low; bottles may be near freezing.

Safety first: Unplug the unit before accessing internal components. Handle bottles carefully if they are very cold or frozen.

Steps to address H2:

• Verify set temperature: Confirm that the setpoint on the display is appropriate for wine storage (typically 5–18°C depending on zone). Adjust if accidentally set too low.
• Power reset: Unplug the cooler for 10–15 minutes, then reconnect. Observe whether the compressor cycles off correctly as the set temperature is reached.
• Check temperature sensors: If the compressor runs almost continuously and H2 appears, test the cabinet and evaporator NTC sensors (see E1/E2). A sensor reading too warm will cause overcooling.
• Inspect main PCB: If sensors are within spec, the compressor relay on the main PCB may be stuck closed. This typically requires replacing the Hoover-compatible main control board.
• Interim measure: Until repaired, you can prevent overcooling by unplugging the unit periodically, but this is not a long-term solution for wine storage.