Bosch dishwasher code E22: filter blocked

What it means

The filters are clogged, so water can’t drain properly. If the filters are clean, Bosch also lists the drain pump, its cover, a kinked drain hose or a clogged air gap.

On models without a display, Bosch signals this with: four lights flashing, or the Active and Clean lights flashing.

What to try

Unplug the dishwasher before any step beyond a quick look, and turn the water off before touching hoses.

1. Take out the lower rack. Turn the filter counterclockwise and lift out the filter system.
2. Wash the filters under running water with mild soap and a soft brush, including the rim between the coarse and fine filters.
3. Refit the filters and turn clockwise until the arrow markings line up.
4. If the code comes back, check the drain hose for kinks and the drain pump cover (see E24 and E25).

Bosch’s manual says to check the filters for leftover food after each wash.

Call a technician if

Resetting a Bosch dishwasher

Once you’ve fixed the cause, Bosch’s way to cancel the cycle and clear the code is to press and hold Reset (Start on some models) for about 4 seconds. The dishwasher pumps out the water, which takes about a minute; then open the door and press On/Off. For electronic faults, Bosch’s code list says to switch the dishwasher off at its breaker for 30 seconds. If four lights flash and it beeps, Bosch says to press On/Off, switch off the power for at least 2 minutes, then switch it back on; if it happens again, press On/Off, turn off the water, unplug it and call Bosch.

Still stuck?

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