Thermador Dishwasher F6 Error Code: Causes and Fixes
Quick answer: Water distribution fault
What you’ll notice
Wash results are poor; water distribution to the spray arms is inadequate.
Thermador
Dishwasher
Code F6
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 deposits
- Spray arm bearing worn — arm does not spin freely
- Water inlet pressure below the minimum required (typically 0.5 bar)
- Inlet filter clogged
Step-by-step fix
- Remove upper and lower spray arms (typically unscrew anticlockwise or lift off).
- Hold each arm under the tap and use a toothpick or skewer to clear each jet hole.
- Check that each arm spins freely when reinstalled.
- Clean the inlet hose filter.
Tools you may need
Toothpick or thin wireSmall brush
Prevention
- Use a dishwasher cleaner monthly in hard-water areas.
- Check spray arm rotation monthly.
When to stop DIY
Replace spray arms if jets cannot be cleared or the bearing is visibly worn.
FAQ
What does F6 mean on Thermador dishwasher?
F6 usually indicates: Water distribution fault.
Can I keep using the appliance with F6?
Use caution. Severity is medium. Replace spray arms if jets cannot be cleared or the bearing is visibly worn.
How long does this fix usually take?
Typical first-pass troubleshooting takes 15–20 minutes.