Bosch Dishwasher E22 Error: Filter Fix & Replacement Part (#00645038)
Quick Answer: The E22 error code on a Bosch dishwasher indicates that the lower triple-mesh micro filter is clogged with grease or food debris, or the drain pump is detecting residual water resistance. Cleaning or replacing the Micro Filter Assembly (#00645038) resolves 85% of E22 errors.
⚠️ Why E22 Comes Back Right After Cleaning the Filter: Even if your filter looks clean to the naked eye, transparent fats and calcium film coat the microscopic nylon mesh pores! Scrubbing it with hot water, dish soap, and a soft brush—or swapping in a fresh #00645038 filter—stops E22 immediately.
#1 Most Common Fix: Bosch OEM Micro Filter Assembly
Official OEM Part Number: #00645038
⏱️ Install Time: 1 Minute (Twist-and-lift, zero tools) | 💰 Avg Cost: $22.50 – $28.99 (Saves $300 service call)
Step 1: Free 2-Minute Reset & Test (Try This First)
Before ordering replacement parts, perform this quick reset sequence to rule out a temporary sensor trip:
- Open the dishwasher door, pull out the bottom rack, and twist the cylindrical filter counter-clockwise to lift it out.
- Separate the plastic micro-mesh cylinder from the flat metal plate and scrub it with hot water, Dawn dish soap, and a toothbrush to dissolve invisible grease film.
- Scoop water out of the sump pit and verify no lemon seeds or glass shards are touching the drain pump impeller under the white snap-cover.
- Lock the filter back in (arrows must align!) and run a hot cycle.
Step 2: 60-Second Symptom & Part Number Lookup Table
Match your exact Bosch E22 symptom below to get the factory replacement part number:
| What You Are Seeing (Symptom) | Required OEM Part & Number | Difficulty & Cost | Direct Part Link |
|---|---|---|---|
| Nylon mesh is torn, warped, or permanently stained with calcified grease causing repeated E22 codes Cause: Degraded Micro Filter Cylinder |
Bosch OEM Micro Filter Assembly#00645038 |
10-Second Drop-In Est: $25.99 |
Check Price on Amazon → |
| Filter is brand new or spotless, but E22 alternates with E24 at the end of the cycle Cause: Weakening Drain Pump Motor drawing irregular current |
Bosch OEM Drain Pump#00631200 |
Easy DIY (15 min) Est: $36.99 |
Check Price on Amazon → |
Frequently Asked Questions (Bosch E22)
How does a Bosch dishwasher know the filter is clogged (E22)?
Bosch dishwashers do not have an optical sensor in the filter. Instead, the control board measures the electrical current (amperage) drawn by the drain and circulation pumps. When a clogged filter restricts water flow, pump amperage drops, triggering code E22.