How to Quickly Fix the Bosch Dishwasher E22 Error

The Bosch dishwasher E22 error code means that the filter is blocked and water is unable to drain out of the dishwasher properly. A clogged or dirty filter prevents water from flowing out through the drain hose and results in dirty water collecting in the dishwasher sump. It is recommended to thoroughly clean the dishwasher filter every 3 to 6 months to keep your dishwasher running efficiently. However, if you have cleaned the filter but your dishwasher is still displaying the E22 error, then the blockage may be in the drain hose or drain pump instead. Use this guide to find and remove the source of the blockage to get your dishwasher running properly again.

Blocked Bosch Dishwasher Filter

The filter is responsible for trapping food particles, debris, and other solid residues during the washing cycle. It prevents these particles from recirculating and sticking to clean dishes. It also helps maintain the cleanliness of the dishwasher's interior as well as the plumbing system. Aside from standing water in the dishwasher sump, other signs that the filter is blocked include longer washing times, sudden unusual noises, a smelly odor in the dishwasher, and debris/residue on your dishes at the end of a cycle.

How to Remove the Filter in a Bosch Dishwasher

1. Turn the dishwasher off and disconnect it from the power outlet.
2. Pull the bottom rack out of the dishwasher and set it aside.
3. Remove the bottom spray arm by lifting it upwards or removing the mounting hardware that holds it in place.
4. Locate the filter at the bottom of the dishwasher tub.
5. Turn the filter knob/cap counterclockwise to disengage it and pull it straight up to remove the filter assembly from the dishwasher.
6. Inspect the assembly for any signs of damage. If any is present, you will need to replace the filter assembly.
7. If there is no damage, you can proceed to clean the filter.

How to Clean the Dishwasher Filter to Fix the Bosch E22 Error

1. First, remove any large food particles/debris from the filter assembly and throw them into the trash.
2. Twist the filter cap off to separate it from the filter screen for a more thorough cleaning.
3. Rinse the cap and screen under warm running water.
4. Use a soft-bristled brush and dish detergent to gently scrub both and remove any stubborn debris.
5. Once clean, reattach the filter cap and the screen and let the assembly dry completely before returning it to the dishwasher.
6. Place the filter assembly back inside the dishwasher and turn it clockwise to lock it into place.
7. Reattach the bottom spray arm and return the dishwasher rack.
8. Reconnect the dishwasher to power and check that the E22 code has been cleared.

Blocked Bosch Dishwasher Drain Hose

The drain hose is responsible for transporting water out of the dishwasher and into the garbage disposal or sink’s drain at the end of a cycle. It is normal for the drain hose to become blocked due to a build-up of food particles and other debris. When the drain hose is obstructed, water is unable to drain out of the dishwasher properly and it collects in the dishwasher sump leading to the E22 error.

How to Clear a Blocked Drain Hose to Fix the Bosch E22 Error

1. Disconnect the dishwasher from the power outlet or turn it off at the circuit breaker, and turn off the water supply
2. Remove the dishwasher’s kick plate, also known as a toe-kick, to access the drain hose.
3. Use a pair of pliers to compress the clamp that secures the drain hose to the dishwasher. It is advised to place a bucket or towel underneath the drain hose to catch any water that may fall out.
4. Visually inspect the hose for obstructions and run high-pressure water into the hose to force any build-up out.
5. If this does not work, use a long-handled tool to push out the blockage. Be very careful not to damage the hose.
6. Once the hose is free of any blockages, you can reattach it to the back of the dishwasher and secure it with the clamp.
7. Return the kick plate to the dishwasher and reinstall the appropriate screws to hold it in place.
8. Reconnect the dishwasher to the power supply, turn on the water supply, and check that the error has been resolved.

Blocked Bosch Dishwasher Drain Pump

The drain pump pumps the dishwasher's wastewater through the drain hose and out of the dishwasher into your home's plumbing system during the drain cycle. Over time, it can become blocked due to the accumulation of food debris, grease, or foreign objects like pieces of broken glass or utensils. Mineral deposits and lime scale can also block it. A malfunctioning drain pump can lead to water not draining properly from the dishwasher, causing issues like poor cleaning, leakages, or standing water in the tub. Depending on your dishwasher model, there may also be a second pump, known as a recirculation pump which is responsible for spraying water around the dishwasher. However, when dealing with the E22 error, the drain pump is the most likely cause.

How to Clear a Blocked Drain Pump to Fix the Bosch E22 Error

1. Turn off the water supply and disconnect the dishwasher from the power outlet.
2. Locate the drain pump, usually towards the front of the appliance, and disconnect the hoses from the pump.
3. Check the inlet and outlet ports on the pump for any items that may be causing an obstruction.
4. Turn the impeller to check that it is moving freely.
5. Use a pair of needle nose pliers to pull out any hard-to-reach items.
6. Once you have confirmed that the pump is free of any blockages you can reattach the hoses and reassemble the dishwasher.

By following the step-by-step instructions in this article, including regularly cleaning the filter, inspecting the drain hose obstructions, and clearing any debris from the drain pump, you can prevent blockages and keep your dishwasher running smoothly. Remember that regular maintenance is essential for ensuring the efficient performance of your dishwasher.