Display shows H1 and the cabinet temperature is much higher than the setpoint; unit may not cool at all.

Safety: Unplug the wine cooler before removing rear panels. Do not attempt to open the sealed refrigeration system yourself.

Initial checks:

• Door and load: Ensure the door is fully closing and gaskets are sealing. Avoid frequent door openings and overloading with warm bottles.
• Condenser and fan: Remove the rear lower panel. Clean dust from the condenser coil and verify that the condenser fan runs when the compressor is supposed to be on.
• Compressor operation: Touch the compressor carefully; it should be warm and vibrating slightly when running. A cold, silent compressor indicates it is not starting.
• Frost pattern: If accessible, check the evaporator coil behind the interior panel. Only a small section frosted or no frost at all suggests a sealed system issue.

Actions:

• If the condenser fan motor is not running but receives power, replace it.
• If the compressor does not start and you have already ruled out the start relay/overload, the compressor may be failed.

Important: Refrigerant leaks, compressor replacement, and sealed system repairs must be performed by a licensed refrigeration technician. In these cases, use the H1 alarm as a prompt to schedule service.