E22 on SHP78CM5N points to the removable filter system being soiled or not seated, restricting circulation near the end of a cycle. Use the exact code to separate water inlet, drainage, foam, leak protection and internal faults. Do not order a part until the visible installation and removable filters have been checked. Food residue on the fine filter or an unlocked filter cylinder prevents water moving freely through the sump. E22 calls for filter inspection; E25 instead names the drain pump or its cover, below the filter assembly. Cancel, unplug, let water cool, twist out the filter unit, rinse mesh under running water with a soft brush, clean its seat and lock it back at the alignment marks. Check the filter cannot lift, then run a rinse. If E22 returns with clean locked filters, request Bosch service.
Models covered
Safety first
- Wear gloves around the sump because broken glass may be hidden. Do not tilt a built-in appliance or remove its base, side panels or wiring cover.
What the symptom may indicate
Checks in the right order
- Confirm the pattern
Food residue on the fine filter or an unlocked filter cylinder prevents water moving freely through the sump.
- Prepare safely
Cancel the cycle, switch the dishwasher off, close the water valve and wait for hot water and dishes to cool before touching a filter or hose.
- Apply the official check
Cancel, unplug, let water cool, twist out the filter unit, rinse mesh under running water with a soft brush, clean its seat and lock it back at the alignment marks.
- Retest once
Check the filter cannot lift, then run a rinse. If E22 returns with clean locked filters, request Bosch service.
Stop and get qualified help when
- Stop and arrange service for water in the base, a heat or motor code, a leak that continues with the valve closed, or a code that returns after one empty test.
Next step
Repair, replace a part, or arrange a diagnosis?
Use the checks and stop conditions above to choose a cautious next step. A symptom alone never proves that the appliance has failed.
Resolve it without buying anything
Complete the 4 user-accessible checks in order. If normal operation returns and no warning sign remains, no replacement is indicated.
Replace only the confirmed part
If the checks isolate a worn or blocked component, match its complete reference to the exact appliance model before ordering.
This guide does not identify a replacement part. Do not order a generic component from the symptom alone.
Arrange a diagnosis before replacing the appliance
Stop at any warning sign listed above. A qualified diagnosis should confirm that repair is unsafe, unavailable or uneconomical before an appliance replacement is considered.
Sources used
- Bosch — Bosch's official material documents “Bosch SHP78CM5N error E22: filter blocked” and the user checks retained here.
Last checked: 30 August 2026