Display shows E9; refrigerator may not cool properly, and compressor may not run or may short cycle.

Safety first: Unplug the refrigerator before accessing the compressor area. Refrigerant systems are sealed—do not open sealed lines.

• Listen for compressor operation: When powered, you should hear a low hum or feel vibration at the compressor. If it is silent and E9 is displayed, there may be an inverter or compressor fault.
• Inspect inverter module: Many JennAir models use a separate compressor inverter board mounted near the compressor. Check for loose connectors, burn marks, or a burnt smell.
• Check wiring: Ensure the harness from the main control board to the inverter and from the inverter to the compressor is secure.
• Do not attempt sealed system repairs: Testing compressor windings and refrigerant pressures requires specialized tools and EPA certification.
• Call a professional: An E9 code almost always requires diagnosis by a qualified refrigeration technician, who may replace the compressor inverter board, the compressor, or the main control board depending on test results.