Display shows Hi for temperature and the unit may not cool or may be very warm inside.

Safety: Unplug the cooler before accessing internal components.

Steps:

• Check door and environment: Ensure the door is fully closed and the unit is not installed in a very hot room. Allow several hours after initial startup for cooling.
• Verify compressor operation: Briefly plug in and listen for the compressor and condenser fan. If silent, inspect the start relay and overload as in the E3 procedure.
• Inspect cabinet thermistor: If the display shows Hi even when the interior feels cool, the thermistor may be open. Test and replace as needed.
• Check evaporator fan: If the compressor runs but the interior remains warm, ensure the evaporator fan is operating and circulating air.

Warning: If the compressor is hot to the touch and not running, or if you suspect a sealed system issue, contact a professional technician.