Thermador Dishwasher E4 Error Code: Causes and Fixes
Quick answer: Spray arm performance low
What you’ll notice
Cycle pauses; spray arm performance has fallen below the minimum threshold.
Thermador
Dishwasher
Code E4
medium 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
- Spray arm holes blocked by limescale or food
- Object in the rack obstructing spray arm rotation
- Low inlet water pressure
Step-by-step fix
- Remove and clean the spray arms (see F6 steps).
- Check that no tall items in the rack block arm rotation.
- Spin both arms by hand before starting the next cycle.
Tools you may need
ToothpickSmall brush
Prevention
- Check spray arm clearance when loading the machine.
When to stop DIY
Replace spray arms if cleaning does not restore normal rotation.
FAQ
What does E4 mean on Thermador dishwasher?
E4 usually indicates: Spray arm performance low.
Can I keep using the appliance with E4?
Use caution. Severity is medium. Replace spray arms if cleaning does not restore normal rotation.
How long does this fix usually take?
Typical first-pass troubleshooting takes 10–15 minutes.