If you open your Thermador dishwasher at the end of a cycle and find water sitting at the bottom, you’re dealing with a drainage fault — one of the most common service calls we get, and usually traceable to a specific cause.
Start With the Filter
The lower filter assembly is the single most common cause of drainage complaints, and is exactly what triggers an E2 error code when blocked. Remove it, rinse it thoroughly, and run a short cycle to test.
Check the Pump Cover
A drain pump cover that’s come loose can also restrict drainage — roughly 40% of Thermador drainage faults trace back to the pump itself.
When It Escalates
Unresolved drainage (E24) can eventually pool into the base pan and trigger the more serious E15 safety fault, which is why we recommend resolving drainage issues within a day or two rather than letting them sit.
What to Do Next
If clearing the filter doesn’t resolve it, it’s time to book a diagnostic. Visit our dishwasher repair page.
Not Confident Doing This Yourself?
A factory-trained technician can diagnose and fix it safely, usually same-day.