Thermador Dishwasher E22 Error Code: Filter Blocked

Quick Answer

E22 on a Thermador dishwasher is a filter blockage warning - the most straightforward error code to fix. The triple filter system consists of a coarse strainer, a flat mesh filter, and a fine filter cylinder. When these clog with food debris, grease, or mineral scale, water cannot recirculate and E22 triggers. The fix is simply removing all three filter components and cleaning them under running water. After reinstalling the clean filter, the impeller in the sump should spin freely - if it does not, debris may have passed through into the pump housing. E22 has a 95% self-repair rate with basic filter cleaning.

ThermadorDishwasherSeverity: low95% DIY Success

Time to Fix

5–15 min

Difficulty

beginner

Parts Cost

—

Tools Needed

Soft brush or old toothbrush for filter cleaning, White vinegar (for mineral scale soaking)

Wrong code?

Not seeing E22 on your display?

Select what your appliance is actually doing and we'll take you to the right guide.

filter blocked, poor wash performance

BoschE22

What Does the E22 Code Mean?

The triple filter is clogged with food debris or grease. Remove and clean all three filter components to clear E22.

Most Likely Causes

Based on aggregated repair data, here is the probability breakdown for this error code:

Food debris accumulation in the coarse strainer and flat filter40%

Grease buildup clogging the fine filter cylinder24%

Long interval between filter cleaning cycles22%

Mineral scale from hard water restricting flow through the filter14%

Symptoms You May Notice

E22 displayed on control panel
Dishes not getting clean - poor wash performance
Cycle stops mid-wash phase
Unusual gurgling or restricted spray sounds during wash
Water draining slowly but machine still showing error

Can you reset a Thermador dishwasher to clear the E22 code?

Clean the triple filter and reinstall it correctly. Press Start/Stop for 3-5 seconds to cancel any active fault, then select a new cycle. Alternatively, unplug for 60 seconds before restarting.

Tools Required for Diagnosis

Soft brush or old toothbrush for filter cleaningWhite vinegar (for mineral scale soaking)Towels

Diagnostic Checklist

Follow these steps in order. We start with the easiest external fixes before opening up the machine.

Remove the lower rack

Remove the lower rack. Look at the bottom of the tub - you will see the filter assembly in the center. Twist the coarse strainer handle counterclockwise about a quarter turn and lift it out.

Lift out the flat mesh filter that sits beneath the coarse strainer

Before reinstalling the filter, look into the sump opening

Reinstall the filter components (fine cylinder first

Frequently Asked Questions

How often should I clean the Thermador dishwasher filter?

Thermador recommends cleaning the triple filter approximately once a month under normal use. If you wash heavily soiled loads or do not pre-rinse dishes, clean it every two weeks. Regular cleaning prevents E22 and also improves wash performance.

Can E22 cause dishes to come out dirty even without stopping the cycle?

Yes. A partially clogged filter reduces water pressure to the spray arms, leaving dishes with residue or cloudiness even when the cycle completes without an error. If your dishes have been gradually getting less clean, the filter is the first thing to check - even before E22 appears.

Is E22 the same as E24 on Thermador dishwashers?

They are related but distinct. E22 specifically means the filter is blocked and water cannot circulate properly through the wash circuit. E24 means the machine failed to drain - clogged filter can cause both, but E24 can also result from drain hose issues or a failed drain pump.

The filter looks clean but I still get E22. What is wrong?

If the filter is genuinely clean and E22 persists, check the impeller in the sump (it should spin freely) and confirm no debris is lodged behind the filter housing. In rare cases, the wash pump motor or the circulation pump flow sensor has failed, requiring a multimeter test and possible replacement.

Related Thermador Dishwasher Error Codes

Code: HUBThermador Dishwasher Error Codes: Complete List for DWHD and Sapphire Series Code: E24Thermador Dishwasher E24 Error Code: Drain Fault Code: E25Thermador Dishwasher E25 Error Code: Drain Pump Blocked Code: RESETHow to Reset a Thermador Dishwasher and Clear Error Codes

Same Fix on Other Brands

Bosch dishwasherE22: Bosch Dishwasher E22 Error Code

Same Fix Works on These Brands

Thermador shares the same hardware platform with these brands. The diagnosis and repair steps are identical.

Bosch dishwasherBosch Dishwasher E15: Fix the Anti-Flood Alert Fast Bosch dishwasherBosch Dishwasher Error Codes: Complete List + Fixes Bosch dishwasherHow to Reset a Bosch Dishwasher (Every Method)Bosch dishwasherBosch E24 Error: Drain Problem Solved Step by Step Bosch dishwasherBosch E25 Code: Drain Pump Fix Without a Technician Bosch dishwasherBosch Dishwasher Not Draining: Every Cause Covered

Models Known to Experience E22 Errors

This repair applies to most Thermador dishwashers with this error code. Common model numbers include:

DWHD440MFP, DWHD640JFP, DWHD640ZFP, DWHD660ZFP, DWHD771WFP

Last verified for technical accuracy on March 14, 2026