Thermador Dishwasher E22 Error Code: Causes and Fixes
Quick answer: Filter or drain blockage
What you’ll notice
Wash cycle performance is poor or the machine stops; filter or drain is obstructed.
Thermador
Dishwasher
Code E22
low severity
Thermador models: Thermador is owned by the Bosch Group and shares the Bosch dishwasher platform. The three-stage filter system is identical to Bosch. Thermador dishwashers are typically flush-installed in cabinetry — pull forward carefully on the levelling feet to access drain and inlet connections.
Common causes
- Main filter assembly clogged with food debris
- Drain pump housing has a hard object (seed, glass fragment) inside
- Drain hose kinked
Step-by-step fix
- Remove the lower basket and spray arm.
- Twist out the filter assembly and rinse under running water; scrub with a soft brush.
- Inspect the sump area below the filter for foreign objects.
- Reinstall the filter firmly and run a short cycle.
Tools you may need
Soft brushNeedle-nose pliers (for debris in sump)
Prevention
- Clean the filter once a month.
- Pre-scrape plates before loading — the filter is not a food processor.
When to stop DIY
Call a technician if the pump impeller is visibly damaged or the bearing sounds rough after clearing.
FAQ
What does E22 mean on Thermador dishwasher?
E22 usually indicates: Filter or drain blockage.
Can I keep using the appliance with E22?
Use caution. Severity is low. Call a technician if the pump impeller is visibly damaged or the bearing sounds rough after clearing.
How long does this fix usually take?
Typical first-pass troubleshooting takes 10–15 minutes.