Diagnostics show E9; refrigerator may not cool; compressor may not start or may short-cycle.

Safety first: Do not attempt to open the sealed refrigeration system. Compressor and refrigerant work must be done by an EPA-certified technician.

Steps to resolve:

• Check ventilation: Ensure there is adequate clearance around the refrigerator (typically at least 1 inch at sides and back, more at top) and that vents are not blocked.
• Listen for compressor: When the unit calls for cooling, listen at the back. A humming then clicking off may indicate a start problem.
• Inspect inverter module: If your model uses an inverter, visually inspect for burnt marks or loose connectors (with power off).

If E9 persists and cooling is poor, a sealed system or compressor/inverter fault is likely. This requires professional diagnosis and repair; do not attempt to replace the compressor yourself.