Washer displays E07 and will not spin; drum may attempt to start then stop.

Safety first: Unplug the washer. Do not repeatedly try to run the machine with this error, as it can damage the control board further.

Step-by-step checks:

• Check drum rotation by hand: Open the door and spin the drum manually. It should rotate smoothly and quietly. If it is stiff, grinding, or seized, the tub bearings may be failing and causing motor overload.
• Inspect motor and harness: Remove the rear panel. Check the motor for signs of overheating or burning. Inspect the wiring harness for melted insulation or chafing against the cabinet. Repair or replace damaged wiring.
• Test motor windings: Disconnect the motor connector and measure resistance between windings according to the Grundig wiring diagram. If any winding is shorted to the motor frame (test with meter to ground) or readings are far from spec, replace the motor.
• Control board inspection: Remove the top cover and access the main PCB. Look for burnt tracks or a damaged motor triac/IGBT. If visible damage is present, the PCB should be replaced. This repair is complex and often best left to a professional.