Thermador Dishwasher E1 Error Code: Causes and Fixes
Quick answer: Door switch/lock state issue
What you’ll notice
Cycle does not start; door lock is not confirming the secured state.
Thermador
Dishwasher
Code E1
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
- Door not fully latched
- Door latch hook broken
- Door lock module microswitch failed
Step-by-step fix
- Close the door firmly until you hear the latch click.
- Inspect the latch hook on the door for damage.
- Test the door lock module — press in the lock plunger by hand and listen for a click.
Tools you may need
FlashlightScrewdriver set
Prevention
- Do not force dishwasher doors shut — latch hooks are relatively fragile.
When to stop DIY
Replace the door lock module if the hook is intact but the machine still shows the error.
FAQ
What does E1 mean on Thermador dishwasher?
E1 usually indicates: Door switch/lock state issue.
Can I keep using the appliance with E1?
Use caution. Severity is medium. Replace the door lock module if the hook is intact but the machine still shows the error.
How long does this fix usually take?
Typical first-pass troubleshooting takes 5 minutes (close check); 20 minutes (lock module replacement).