EdgeStar ice maker displays E9; unit may shut down and not restart until power is cycled.

Safety first: Unplug the unit before servicing. High-pressure refrigeration components should only be serviced by qualified technicians.

• Improve ventilation: Ensure the ice maker has proper clearance and is not installed in a confined, unventilated space. Remove any obstructions from the rear and sides.
• Clean condenser coils and fan: Remove dust and debris from the condenser and verify the fan operates correctly when the compressor runs.
• Reset the unit: After improving airflow, leave the unit unplugged for 20–30 minutes to allow the high-pressure switch to reset, then restart.
• Monitor operation: If E9 recurs quickly, the sealed system may be overcharged, restricted, or the high-pressure switch may be faulty.
• Call a technician: High-pressure switch replacement and sealed system diagnosis require specialized tools and certification. Schedule service if basic airflow corrections do not resolve E9.