Bosch WAK28260GB Washing Machine Shows E-21 Error Code With Drum Symbol

Hi Tim,

Thanks for sending the video regarding your Bosch WAK28260GB Washing Machine.

Please check everything listed below and make sure it is working properly.

If the machine won't start and error code E21 is stored on the control board, you need to clear the "last stored error E21". Accessing this function can be a bit tricky, so just be patient and keep trying.

You could also unplug the machine for a few days. This may clear the error code when the control board battery runs out and resets to factory settings.

I am sorry I cannot help further without seeing the machine in person. 

The E21 error code on your Bosch WAK28260GB indicates a drainage or motor drive failure. This means the machine cannot drain water properly, or the drum is failing to rotate during the wash or spin cycle. The good news is that in many cases, the issue can be resolved without calling an engineer.

Check the Drain Filter First

The most common cause of an E21 error is a blocked drain filter. Lint, coins, small stones, and other debris often accumulate in the filter at the base of the machine, preventing water from exiting. To clear it:

• Open the service flap at the bottom front of the machine
• Place a shallow tray and towel on the floor to catch any water
• Carefully unscrew the filter by turning it anticlockwise
• Remove any debris from inside the filter and the filter housing
• Rinse the filter under running water if needed
• Screw the filter back in firmly and close the flap

Run a short test cycle to see if the error clears.

Inspect the Drain Hose

If the filter is clean, check the drain hose at the back of the machine. Look for kinks, twists, or pinches that could restrict water flow. Also inspect where the hose connects to your household plumbing—blockages can occur at the connection point. Straighten any kinked sections and ensure the connection is secure and unobstructed.

Listen for Motor Issues

If water drains but the drum still fails to spin, or if you hear the motor humming without the drum moving, the problem may be internal. The carbon brushes in the motor wear down over time and can fail when they become too short—typically below 1 cm. A humming sound during a spin cycle with no rotation is a strong indicator of worn brushes.

Faulty Drain Pump

If the pump motor hums or makes noise during a drain cycle but water does not pump out, the pump itself may be damaged or jammed internally. This typically requires pump replacement.

Start with the drain filter and hose checks—these resolve the majority of E21 errors. If the problem persists after these steps, the motor brushes or pump may need professional attention.

I've linked some videos below that can help you along the way. If you need more help, please reach back out to us.