When your Bosch washing machine displays the E22 error code, it means the Aquastop safety system has been triggered. This feature is designed to prevent water leaks from causing damage to your home. While the error might feel alarming, it’s actually a protective measure to keep your washer and floors safe. The key is to identify the source of the leak or water buildup and resolve it quickly.

What does the E22 error mean?

The Bosch washer E22 error refers to the Aquastop system detecting water where it shouldn’t be—usually in the machine’s base tray.

• The Aquastop shuts off water flow immediately to avoid flooding.
• It may be triggered by a visible leak, slow drip, or even excess condensation.
• The washer will not operate again until the issue is resolved and the sensor is reset.

In short, the Bosch washing machine Aquastop error signals a potential leak and locks the system to protect you.

Common causes of the E22 error

• Leaking Hose

  Cracked, loose, or improperly connected inlet and drain hoses can allow water to escape.

• Internal Leaks

  Faulty pumps, damaged seals, or tub connections can leak water into the washer’s base tray.

• Blocked or Overflowing Detergent Drawer

  Excess suds or too much detergent can push water out of the drawer and into the washer housing.

• Condensation or Small Drips

  Over time, even small leaks or condensation buildup can collect in the base tray and trigger the Aquastop sensor.

• Faulty Aquastop Sensor

  Though rare, the sensor itself may malfunction and send a false signal.

How to fix the E22 error

Follow these safe troubleshooting steps:

• Disconnect Power and Water Supply
  • Always unplug the washer and turn off the water valves before inspecting it.
• Check Hoses
  • Look for cracks, loose fittings, or blockages in both inlet and drain hoses. Tighten or replace as necessary.
• Inspect the Detergent Drawer
  • Clean out any detergent buildup or overflow that may have caused water to spill inside.
• Drain the Base Tray
  • Carefully tilt the washer forward or sideways to let any collected water escape. This may temporarily clear the error.
• Restart the Machine
  • Plug it back in and test. If the error reappears, the problem may be internal and require service.

When to call a technician

You should contact a Bosch-certified technician if:

• Water keeps reappearing in the base tray after tilting the washer.
• All hoses and fittings are secure but the error persists.
• The Bosch washer water in the base tray problem is linked to a pump, seal, or internal leak.
• The Aquastop sensor itself is suspected to be faulty.

Since leak-related issues can cause significant water damage, timely professional repair is essential.

Conclusion

The E22 Aquastop error is a leak detection alert that stops your Bosch washing machine to prevent flooding. In some cases, it’s as simple as tightening a hose or draining the base tray. But if leaks persist or internal components are at fault, professional service is the safest solution. Addressing the issue quickly will keep your washer reliable and your home protected.