Bosch Dishwasher Error Code E22: How to Fix It

The Logic Verdict

My Take: The tech in the video literally says, “don’t worry, this is normal” while twisting the sump filter out, wiping the muck off, and rinsing it under the sink for a solid two minutes before reassembling and running a quick wash. Start by duplicating that cleaning sequence—the E22 cleared the moment his microfilter was spotless and seated correctly.

What It Means

E22 is Bosch’s way of telling you there is still standing water and debris in the sump/filter stack. When the fine screen is caked with food sludge, water can’t pass through fast enough, so the controller halts the cycle and flashes E22.

Common Causes

1. Grease-packed microfilter — exactly what the video shows; the mesh is coated in soap film and scraps.
2. Food sediment left in the sump channels under the screen, especially after a cancelled cycle.
3. Downstream restrictions (drain hose, pump impeller) that keep dirty water sitting on top of the filter even after you clean it.

Step-by-Step Fix

1. Pause and crack the door: Cancel the wash and let the heater shut off so you are not reaching into scalding water.
2. Remove the filter stack: Slide the lower rack out, twist the center handle counter-clockwise, and lift the coarse screen and microfilter cartridge straight up like the host does.
3. Clean the sump opening: Use a cloth to wipe soap film from the stainless lip and carefully feel around the standing water for stray glass, bones, or labels (the video reminds you the water may still be hot).
4. Rinse the filter thoroughly: At the sink, flush both sides of the mesh under warm water for about two minutes while rubbing away grease with your hand until the screen is visibly clear.
5. Reinstall and lock it: Drop the filter back in, align the arrows, twist clockwise until it seats firmly, and tug upward gently to confirm it’s locked just like in the clip.
6. Run a short rinse: Close the door and start a 30-minute quick wash to purge any leftover grit. If E22 returns immediately, inspect the drain hose or pump for a deeper blockage.

Parts & Tools

• Bosch 00645038 Microfilter Cartridge

Resources