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Bosch Dishwasher Error Code E22: What It Means and How to Fix It

Bosch dishwasher guide · Decoded from manufacturer documentation · Safe homeowner checks only

What is happening inside the machine

A Bosch dishwasher recycles its wash water continuously. Water falls to the floor of the tub, passes through the filter system, and is pumped back up to the spray arms; at the end of each stage the same path carries it out of the drain. The filter system is two parts working as a pair. The flat filter catches the large debris. The cylindrical filter beside it traps the fine particles in a mesh. Together they keep grit out of the pumps and off the dishes, and together they slowly load up with everything they catch.

The control watches how water level and flow behave through a cycle. As the mesh coats with food soil and grease, water passes more and more slowly. Circulation weakens, drainage lags, and the machine reads the restriction as a blocked filter system and reports E22, often late in a cycle, sometimes with cloudy water left sitting above the filters. It is best understood as a maintenance warning with teeth. Ignored, a starved wash pump leaves grit on glasses, the sump stays dirty, and the same restriction can develop into the wider drainage fault covered by E24. The grease half of the story matters too: eco and quick programmes run cooler to save energy, and cool water does not dissolve fats fully, so grease plates out inside the mesh over weeks and glues the soil into a layer that a quick rinse will not shift.

Finding the cause

Wash both filters and judge the mesh against the light

Remove the lower rack, lift out the flat filter, and twist the cylindrical filter anticlockwise to release it, following the arrows moulded on the parts. Soak the pair for ten minutes in warm soapy water, then wash every surface with a soft brush, working along the mesh rather than scrubbing across it. Hold the cylinder up to the light when you think it is clean: the mesh should show through evenly, with no cloudy patches. A filter that comes up clear has told you the restriction was ordinary soil loading, which is the overwhelming majority of E22 codes. A filter that stays coated after a proper soak and brush is carrying baked-on grease, and it needs the hot cycle treatment described in the fixing section before you judge it.

Clean the filter well that everyone forgets

The well underneath the filters is where this code hides its second act. Once the filters are out you will often find a ring of sludge, a stray label, seeds, or fragments of glass sitting in the sump. That debris restricts the pump inlet even with spotless filters fitted, which is why some owners clean the filters beautifully and watch E22 return within days. Wipe the well out with a sponge or cloth and pick out solids with gloved fingers, because the well collects broken glass and sharp bone that are hard to see in dirty water. A clean well plus clean filters closes the most common pair of causes in one visit.

Press the pump cover while you are in there

With the filters out you can see the small drain pump cover beside the well. Press it down and confirm it clicks fully home. A loose cover belongs to the E24 family rather than this one, but it restricts drainage at the same address, and thirty seconds now can save you a second strip-down later. A cover that will not click, or plastic that is cracked, is a finding worth acting on before you run the machine again.

Check how the filters seat, and judge their condition

The cylindrical filter twists and locks into the flat filter and the pair must sit flat in the well with no rocking and no raised edge. Run a fingertip around the rim to feel the seal. A filter refitted crookedly leaves a gap that lets debris bypass the mesh entirely, so the well refills with soil and flow drops again within days, wearing the disguise of a recurring code. Finally, judge the filters themselves: mesh torn by a dropped knife, or plastic warped by very hot water, cannot seal or filter properly. Damage like that is the one finding on this page that calls for a part, and it is a cheap one.

What your findings mean

Fixing it

1. Strip down safely (5 minutes). Machine off at the panel, standing water scooped out and cooled, lower rack removed, both filters lifted out.
2. Deep clean the filters (15 minutes). Ten minute soak in warm soapy water, a soft brush along the mesh, and a rinse until the water runs completely clear with no slimy feel remaining.
3. Clean the well and check the cover (5 minutes, gloves on). Sludge wiped out, solids picked out, pump cover pressed until it clicks.
4. Refit until flush (2 minutes). Flat filter flat, cylinder inserted and twisted until locked, fingertip around the rim to confirm no raised edge.
5. Run the hottest empty cycle (one programme). Fit a dishwasher cleaner per its label, or set a cup of white vinegar in an upright bowl on the upper rack. This strips the grease film from the sump and spray arms that the sink wash could not reach.
6. Confirm on a normal load. A full cycle completing with clear water flow and no code is the proof. If E22 returns within a week despite visibly clean, well seated filters, read the stop section before cleaning a third time.

What it costs

All prices on this page are estimates based on typical US parts and service pricing. Your model, region and the actual failed part will move the real figure.

Repair or replace: E22 is a cleaning job, not a parts job, and it never justifies a new machine. The largest realistic spend is a filter set or a single service visit if the code turns out to be standing in front of a deeper drain fault. Keeping E22 away afterwards is habits, not money: scrape plates into the bin without pre rinsing them spotless, run the hottest programme at least once a week so grease stays dissolved, and rinse the filters monthly before soil bakes into a mat.

Mistakes that make it worse

Washing only the top filter. The pair works as a system and the cylinder carries the fine load. A clean flat filter over a matted cylinder changes nothing, and the code returns wearing the disguise of a mystery fault.

Skipping the well. Spotless filters over a sludge-filled sump still starve the pump. The well is two minutes of work and the difference between a fix and a repeat performance.

Refitting the filters crooked. A raised edge lets unfiltered debris pour into the sump on every cycle. The code comes back within days and the filters get blamed, when the seating was the fault.

Living on eco cycles alone. Cool programmes save energy and plate grease onto the mesh. One hot cycle a week is the cheap insurance that keeps the deep cleans rare.

Bosch, Siemens and Neff share this platform and filter design, and E22 behaves the same across them. For the wider drainage fault, see the Bosch E24 guide. Back to the full list: Dishwasher Error Codes

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