How to Fix Bosch Dishwasher E22 Error Code

The Bosch dishwasher E22 error code indicates that water remains in the dishwasher basin at the end of the cycle, suggesting a drainage issue. Fortunately, this is typically an easy problem to fix.

In most cases, the issue arises from a clogged filter. To resolve the Bosch dishwasher E22 error code, start by removing and cleaning the filter.

How to Access the Filter

For most Bosch dishwashers, the filter can be easily removed by turning it counterclockwise and lifting it out. If you're unable to remove it, refer to your owner's manual for instructions on filter removal.

If the filter is stuck, check the dishwasher basin for any debris that could be obstructing drainage. If the E22 error persists, inspect the drain hose and pump for possible issues. In some cases, a malfunctioning control board might cause the error to appear despite no drainage issue.

What Does the Filter Look Like?

A Bosch dishwasher filter consists of three parts. The core filter is surrounded by a mesh filter and then a fine mesh layer. The filter is encased in a square metal mesh panel, which also needs to be removed to access the fine mesh filter.

Step-by-Step Guide to Resolve the Bosch E22 Error Code

1. Unplug the dishwasher for safety.
2. Open the dishwasher door, then remove the bottom dish rack for better access to the filter.
3. Remove the bottom spray arm to get easier access to the filter. This can typically be done by pulling the spray arm out or loosening a screw cap.
4. Locate the circular filter at the bottom of the dishwasher, situated at the center of the square metal mesh panel.
5. Turn the filter counterclockwise to unlock it and then lift it out.
6. Remove the square metal mesh panel from the basin. Be cautious of sharp edges or hot water if the dishwasher recently completed a cycle.
7. Take out the fine mesh filter.
8. Clean all filter components and the metal panel using detergent and warm water. Use a soft brush, like an old toothbrush, to remove stubborn debris.
9. Reinstall the filter and panel in the reverse order. Place the fine mesh filter first, followed by the square panel, then the remaining filter components.
10. Lock the filter in place by turning it clockwise so the arrows on the basin align.
11. Reassemble the dish rack and spray arm.
12. Reconnect the power to the dishwasher.
13. Run a quick cycle to verify that the E22 error code is resolved.

What If the Error Code Persists After Cleaning the Filter?

If the E22 error code remains even after cleaning the filter, the issue may lie in the drain hose or pump. However, a clogged filter is still the most likely cause, so ensure it’s completely clean before inspecting the other parts.

If the filter is clear and no clogs are found in the drain hose or pump, the control board may be faulty, causing a false error message. Since control boards can be tricky to test and repair, it’s advisable to contact a professional technician for assistance.

Calcium Buildup

Calcium buildup around the filter could also be triggering the E22 error code, particularly in areas with hard water. You might notice this buildup when cleaning the filter. To remove it, use a soft brush and dishwashing detergent, or purchase a descaler or dishwasher cleaner to tackle stubborn deposits.

Check Valve or Impeller

Once the filter is removed, you may also want to check the pump impeller and check valve. The check valve prevents wastewater from re-entering the dishwasher after it’s pumped out via the drain hose.

Look for a screw that can be removed to access these components. After removing the screw, you should see the pump impeller and a small rubber check valve. Pull out the check valve and rotate the impeller to check for debris that could be obstructing drainage.

Tip: Try a Dishwasher Cleaner

Before diving into more complex fixes like accessing the drain hose or pump, consider trying a dishwasher cleaner to clear any blockages. These products can be found at most hardware stores or supermarkets.

Drain Hose and Dishwasher Pump

To inspect the drain hose and pump, you may need to remove the dishwasher filter or take off the kick plate panel, depending on your dishwasher model.

Before removing the kick plate, ensure the dishwasher is disconnected from power. You may need to remove wire nuts and disconnect the water inlet line and drain hose to fully access the pump. Some models might also have an access panel at the back or bottom of the dishwasher, so consult your owner's manual for instructions.

Bosch dishwashers may have either one or two pumps—one for circulation and one for drainage. Both should be checked for blockages or signs of damage.

In Summary

A Bosch dishwasher E22 error code is typically caused by a clogged filter, which can be easily fixed by removing and cleaning it. If cleaning the filter doesn’t resolve the issue, check the drain hose, pump, and check valve for blockages or damage. If everything seems clear, a control board fault could be to blame, and a technician should be consulted. Contact us today for reliable and professional Bosch repair services.