Bosch SHPM88Z75N E22 Error Code | E22 Filter Blocked

1. Home ›
2. Bosch ›
3. Dishwasher ›
4. SHPM88Z75N ›
5. E22

• Source: Official Bosch service manual
• Reviewed by: Geo Technical Editorial
• Published: March 1, 2026
• Updated: March 15, 2026
• DIY scope: Basic user checks are possible.

Error e22 on Bosch shpm88z75n: Filter blocked — dishwasher fine filter clogged with food debris preventing prop. Follow the troubleshooting steps below to diagnose and fix this dishwasher issue. ## What Does E22 Mean on a Bosch SHPM88Z75N? Your Bosch dishwasher is displaying an E22 error code, which means the fine filter at the bottom of the dishwasher is blocked with food debris, grease, or mineral deposits. The filter prevents food particles from re-circulating and damaging the pump. When the filter is clogged, water cannot drain properly from the wash tub, water level rises above normal, and the control board detects the blockage and displays E22. This is the most common and easiest-to-fix Bosch dishwasher error. ## Fault Details | Field | Value | |-------|-------| | Error Code | E22 | | Appliance | Bosch SHPM88Z75N 800 Series Plus Top Control Dishwasher | | Fault Type | Filter blocked | | Severity | Low | | User Serviceable | Yes — follow steps below | | Applicable Models | SHPM88Z75N, SHP78CM5N, SHPM65Z55N | ## Common Causes - Filter clogged with accumulated food particles — inadequate pre-rinsing of heavily soiled dishes

• Grease and fat build-up on the filter mesh reducing flow
• Mineral scale from hard water coating the filter mesh and reducing filter porosity
• Filter not cleaned regularly — Bosch recommends cleaning the filter monthly
• Filter not reassembled correctly after previous cleaning, allowing debris to bypass and re-block ## Step-by-Step Troubleshooting | Step | Action | What To Do | Expected Result | |------|--------|------------|-----------------| | 1 | Remove and inspect the filter assembly | Twist and lift the cylindrical filter from the center of the dishwasher floor. Remove the flat fine mesh filter beneath it. Hold both components up to the light — you should be able to see through the mesh. If it is visibly coated with debris or grease, cleaning is needed | Filter components removed and ready for cleaning | | 2 | Clean the filter under running water | Rinse both filter components under warm running water. Use a soft brush (an old toothbrush works well) to gently scrub the mesh on both sides. For stubborn grease, soak in warm soapy water for 5–10 minutes before scrubbing. Do not use abrasive pads that could damage the mesh | Both filter components clean and clear — water flows freely through the mesh | | 3 | Descale if mineral deposits are present | If the filter mesh appears white or has a chalky coating, soak in a solution of equal parts water and white vinegar for 20–30 minutes, then rinse thoroughly. This dissolves calcium and magnesium scale from hard water | Filter mesh clear of scale after vinegar soak and rinse | | 4 | Reinstall the filter correctly | Replace the flat fine mesh filter first, then insert the cylindrical filter and twist clockwise until it locks in place. You should feel a distinct click or feel the filter seat firmly — a loose filter allows food bypass | Filter clicks into locked position; no play when gently lifted | | 5 | Run a test cycle and check drainage | Run a short wash cycle. E22 should clear once the filter is clean and properly installed. If E22 returns immediately after a clean filter is installed, the drain pump or drain hose may have a secondary blockage | Cycle completes without E22; dishwasher drains fully | ## Frequently Asked Questions ### How often should I clean the Bosch dishwasher filter? Bosch recommends cleaning the filter once a month for typical household use. If you frequently wash heavily soiled pots, pans, or dishes with large food particles, clean the filter every 2 weeks. Regular filter cleaning is the single most effective maintenance step to prevent E22. ### Should I pre-rinse dishes before loading them in a Bosch dishwasher? Bosch recommends scraping (not rinsing) large food pieces off dishes before loading. Modern Bosch dishwashers with sensors actually work more effectively when some food residue is present — the sensor adjusts the wash program based on water turbidity. Excessive pre-rinsing can cause the sensor to under-clean. ### Can a dirty filter damage my dishwasher? A severely clogged filter increases strain on the drain pump, which may reduce its lifespan over time. Standing water from a blocked filter can also cause odors and bacterial growth inside the dishwasher. Regular monthly cleaning prevents all of these issues. ### Where is the Bosch dishwasher filter located? The filter is located at the bottom center of the dishwasher interior, beneath the lower spray arm. Remove the lower rack to access it. The filter assembly consists of two parts: a cylindrical mesh filter (twists in/out) and a flat fine mesh plate beneath it. --- Source: Bosch 800 Series Plus Top Control Dishwasher service documentation. Last Updated: March 2026 ### Is it safe to keep using my Bosch shpm88z75n with error e22? If error e22 does not indicate an immediate safety hazard such as a gas leak, electrical short, or water flooding, you can continue limited use while monitoring the appliance. However, running the dishwasher with an active error code increases the risk of further damage. Address the underlying issue as soon as possible. For high-severity errors, disconnect the appliance and contact a qualified technician. ### How much does it cost to fix error e22 on a Bosch shpm88z75n? Repair costs for error e22 on the Bosch shpm88z75n dishwasher depend on the root cause. DIY fixes such as cleaning filters, resetting the unit, or reconnecting loose wires cost nothing beyond basic tools. If a component replacement is needed, parts and labor from a certified technician are the main expenses. Contact a Bosch-authorized service provider for an accurate estimate based on your specific situation. ### What does error code e22 mean on a Bosch dishwasher? Error code e22 on Bosch dishwasher models indicates Filter blocked — dishwasher fine filter clogged with food debris preventing proper drainage. This error is detected by the appliance’s internal diagnostic system and displayed to alert the user that attention is needed. Refer to the troubleshooting steps above for guidance on resolving this issue. ### Is it safe to keep using my Bosch shpm88z75n with error e22? If error e22 does not indicate an immediate safety hazard such as a gas leak, electrical short, or water flooding, you can continue limited use while monitoring the appliance. However, running the dishwasher with an active error code increases the risk of further damage. Address the underlying issue as soon as possible. For high-severity errors, disconnect the appliance and contact a qualified technician. ### How much does it cost to fix error e22 on a Bosch shpm88z75n? Repair costs for error e22 on the Bosch shpm88z75n dishwasher depend on the root cause. DIY fixes such as cleaning filters, resetting the unit, or reconnecting loose wires cost nothing beyond basic tools. If a component replacement is needed, parts and labor from a certified technician are the main expenses. Contact a Bosch-authorized service provider for an accurate estimate based on your specific situation. ### What does error code e22 mean on a Bosch dishwasher? Error code e22 on Bosch dishwasher models indicates Filter blocked — dishwasher fine filter clogged with food debris preventing proper drainage. This error is detected by the appliance’s internal diagnostic system and displayed to alert the user that attention is needed. Refer to the troubleshooting steps above for guidance on resolving this issue.