Wine cooler displays E9 and interior temperature is too cold or too warm despite setpoint

Safety: Disconnect power before accessing the control board.

• Perform a hard reset: Unplug the wine cooler for at least 10 minutes to allow capacitors to discharge. Plug it back in and reprogram the desired temperature.
• Check for stable power: Ensure the cooler is connected directly to a properly grounded outlet (no extension cords or power strips) to avoid voltage drops or surges.
• Inspect control board: Remove the rear access panel and visually inspect the main control board for burnt components, bulging capacitors, or corrosion.
• Verify sensor operation: If other sensor-related codes are not present, briefly check cabinet and evaporator thermistors for reasonable resistance values to rule out sensor issues.
• Replace main control board if needed: If E9 persists after reset and sensors test good, replace the main control board with the correct Amana part number. Transfer all connectors one at a time to the new board to avoid miswiring.
• Reprogram and test: After installing the new board, set the desired temperature and monitor operation for several hours to confirm stable cooling and that E9 does not return.