ERROR CODE EXPLAINED
Thermador Dishwasher
Thermador Dishwasher E12 Error Code
What it means
Thermador identifies dishwasher e12 as limescale build up in the heat pump.
Try this first
- Descale the dishwasher using the manufacturer-recommended descaler.
- If the dishwasher has a water-softener function, use softening salt to help prevent future limescale buildup.
Can I keep using it?⚠ Thermador identifies dishwasher e12 as limescale build up in the heat pump.
Repair usually required?⚠ Follow only the manufacturer-backed checks listed below before replacing parts.
If the error keeps returning
Use the linked official manufacturer support article for model-specific details and service guidance.
Official source
Troubleshooting information verified against manufacturer support documentation.
View manufacturer support page →Safety note:ApplianceSignal provides general troubleshooting information. Always follow the appliance manufacturer's safety instructions and disconnect power when required.