Bosch Dishwasher E22 Error — Clogged Filter & Drain Path Fix (300, 500 & 800 Series)

Common Symptoms

• E22 error code on the Bosch display panel during or at the end of a wash cycle
• Standing water remaining in the bottom of the dishwasher tub after the cycle ends
• Dishwasher stops mid-cycle with E22 and refuses to continue
• Dishes are wet and not fully cleaned — water not circulating properly
• Gurgling or straining sounds from the drain pump area during the drain phase

Most Likely Causes

1. 1

   Clogged Triple Filter System (Most Common — Free Fix)

   Bosch dishwashers use a three-part filter: a large coarse mesh filter (catches food particles), a cylindrical fine filter (traps smaller debris), and a flat micro-filter plate underneath. Food scraps, grease, bone fragments, and label residue accumulate over time and restrict water flow through the filter. Bosch recommends cleaning the filter every 1–2 months, but many households go 6–12+ months without cleaning it — leading to E22. The fix takes 5 minutes and costs nothing.

2. 2

   Sump Area Debris

   Below the filter assembly is the sump — a reservoir that feeds the wash pump and drain pump. Broken glass, fruit pits, twist-off caps, toothpicks, and other hard debris can bypass or fall around the filter and lodge directly in the sump area or at the drain pump inlet impeller. This debris blocks the drain pump from spinning freely, triggering E22. Removing the filter and inspecting the sump with a flashlight often reveals the blockage.

3. 3

   Drain Pump Impeller Jammed or Failed

   The drain pump uses an impeller to push water out through the drain hose. A piece of debris caught in the impeller blades will stall the pump motor, triggering E22. In other cases the pump motor windings fail electrically — the pump won't spin even with a clear impeller. A failed drain pump requires replacement; the correct Bosch part for many 300/500/800 series models is 00654574 or an equivalent third-party replacement.

4. 4

   Drain Hose Kinked or Partially Blocked

   If the drain hose behind the dishwasher is kinked, pinched by the cabinet, or has accumulated grease buildup inside, water cannot exit fast enough and E22 is triggered. This is less common than filter clogs but should be checked if the filter is clean and the pump tests good.

Quick DIY Checks

1. 1SAFETY FIRST — Unplug the dishwasher or turn off the dedicated circuit breaker before reaching inside the tub. Never work on a dishwasher with power connected. Place towels on the floor to absorb any residual standing water in the tub.
2. 2Remove standing water: if there is standing water in the tub, scoop it out with a cup or use a wet/dry vacuum to remove the bulk of it before proceeding. This makes filter removal less messy and lets you inspect the sump area clearly.
3. 3Remove and clean the triple filter system: on Bosch 300/500/800 series (SHPM88Z75N, SHX78CM5N, SHPM65Z55N), the filter assembly is in the center of the tub floor. Twist the cylindrical fine filter counterclockwise about a quarter turn and lift it out. The coarse mesh filter lifts out separately from around it. The flat micro-filter plate is underneath — lift it out as well. Take all three parts to the sink. Rinse them under warm running water and use a soft brush (an old toothbrush works well) to scrub the mesh clean of grease and food residue. Do not use abrasive pads that can damage the mesh. Hold the fine filter cylinder up to a light source — you should be able to see through it when clean. Reinstall in reverse order: micro-filter plate first, then coarse mesh filter, then twist the cylindrical filter clockwise to lock it.

1. 4Inspect and clear the sump area: after removing the filters, shine a flashlight into the sump cavity below. Look for glass shards, fruit pits, bottle caps, or any hard debris. Use needle-nose pliers or your fingers (carefully — glass hazard) to remove any visible foreign objects. Rotate the drain pump impeller by hand if accessible — it should spin freely with slight resistance. If it won't turn, there is debris jammed in the impeller.
2. 5Test the drain pump resistance: if cleaning the filter and clearing the sump does not resolve E22, test the drain pump motor electrically. Access the drain pump by removing the lower access panel (two screws) and disconnecting the pump's two-wire connector. Set your multimeter to resistance (Ω) mode. Probe the two terminals of the drain pump motor. A healthy Bosch drain pump should read approximately 200Ω. A reading of 0Ω (short circuit) or OL/infinite (open circuit — broken winding) means the pump motor has failed and needs replacement.
3. 6Replace the drain pump if needed: if the drain pump tests open or shorted, order a replacement. The Bosch part number for many 300/500/800 series models is 00654574 (verify against your model's FD date code). Third-party equivalents are widely available and typically cost $35–$60. To install: disconnect power, remove the lower access panel, disconnect the pump wiring harness and drain hose clamp, twist the pump counterclockwise to unlock from the sump housing, install the new pump by locking it clockwise, reconnect hose and wiring, and run a test cycle.
4. 7Check the drain hose routing: if the filter is clean and the pump tests good, pull the dishwasher forward and inspect the drain hose behind the unit. Look for kinks, pinch points where the hose runs behind the dishwasher body, or sections that have flattened from the dishwasher's weight. The drain hose should have a high loop under the counter (at least 20 inches from the floor) to prevent backflow. Straighten any kinks and ensure the hose is not compressed.
5. 8Restore power and run a test cycle: reinstall all filters, restore power, and run a short Rinse & Hold or Quick Wash cycle. Monitor the unit for the first 5 minutes — if the drain phase completes without E22, the issue is resolved. Clean the filter every 4–6 weeks going forward to prevent recurrence.

Repair vs Replace

Recommended Tools & Parts

• Bosch Dishwasher Drain Pump Assembly (Part 00654574 or Equivalent)

  Replacement drain pump motor assembly for Bosch 300/500/800 series dishwashers. Required when drain pump resistance tests open or shorted, or when the impeller is jammed and won't spin free. Verify compatibility with your model's FD date code. Part 00654574 fits many SHPM88Z75N, SHX78CM5N, and SHPM65Z55N units.

  $35–$65

  Buy on Amazon →

• Bosch Dishwasher Triple Filter Assembly

  Complete replacement filter set for Bosch dishwashers — includes coarse mesh filter, fine cylindrical filter, and micro-filter plate. Order if the existing filters are torn, warped, or the fine mesh is permanently clogged with mineral buildup that cannot be scrubbed clean.

  $15–$30

  Buy on Amazon →

Links are Amazon affiliate links (tag: fixitfastai-20). Prices are estimates.

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