Display shows E7 and the unit fails to maintain set temperature despite the compressor running.

Safety: Unplug the wine cooler before working at the rear. Ensure good ventilation while cleaning dust.

• Inspect condenser area: Remove the rear lower panel to access the condenser coil and fan.
• Clean condenser coil: Use a soft brush and vacuum to remove dust from the condenser fins. Do not bend the fins.
• Check condenser fan: Spin the fan by hand to ensure it moves freely. Look for obstructions.
• Test fan motor: With a multimeter, check for continuity across the fan motor. If open, replace the motor. When powered, the fan should run whenever the compressor is on.
• Inspect condenser sensor: If fitted, check the NTC sensor clipped to the condenser line. Ensure it is secure and wiring is intact.
• Replace faulty parts: Install a new Grundig condenser fan motor and/or condenser NTC sensor as required.
• PCB diagnosis: If the fan and sensor are good but the fan never receives power, the main control board may be defective and should be replaced.