This guide decodes Thermador Dishwasher Error Codes and shows what to do first. We map each alert to real causes—drain/leak paths, heater/thermistor, circulation modules, door/float sensors, control boards, Home Connect—and outline quick checks vs. brand-level diagnostics to fix the root cause and clear the code the right way.
| Error Code | Causes |
|---|---|
| E12 | Limescale Buildup Detected Learn More |
| E15 | Water In Base Of Dishwasher Learn More |
| E18 | Problem With Water Level or Water Flow Learn More |
| E22 | Filter Needs To Be Cleaned, Unclogged Learn More |
| E23 | Faulty, Clogged or Blocked Drain Pump Learn More |
| E24 | Dishwasher Not Draining, Drain Filter Blocked Learn More |
| E25 | Drain Pump Blocked Or Issue With Drain Pump Cover Learn More |
| E14 | Water Flow Problem Learn More |
| E16 & E17 | Water filling the system Learn More |