Thermador Dishwasher C1 Error Code: Causes and Fixes
Quick answer: Cycle canceled by safety logic
What you’ll notice
Cycle was stopped by internal safety logic; machine is locked out.
Thermador
Dishwasher
Code C1
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
- Combined fault condition — typically a secondary error that the machine couldn't recover from automatically
- Power interruption mid-cycle
Step-by-step fix
- Cancel the cycle, unplug for 5 minutes, and restart.
- If a separate error code appeared before C1, address that code first.
Tools you may need
None
Prevention
- Use a surge protector.
- Do not interrupt cycles by cutting power at the wall.
When to stop DIY
Call a technician if the lockout recurs without another code being shown.
FAQ
What does C1 mean on Thermador dishwasher?
C1 usually indicates: Cycle canceled by safety logic.
Can I keep using the appliance with C1?
Use caution. Severity is medium. Call a technician if the lockout recurs without another code being shown.
How long does this fix usually take?
Typical first-pass troubleshooting takes 5 minutes.