Thermador dishwasher electronics monitor several inputs before allowing the next operating step. If the product shows an E15 error, preserve the selected program, affected zone or compartment, and the point where progress stops. That context keeps a sensor, module, or power symptom from being mistaken for a confirmed failed part.
Safe checks you can make first
- Photograph the code and stop starting new cycles
- Check for visible water at the door or floor
- Shut off the accessible water supply for an active leak
- Note whether the pump continues after the controls are canceled
- Record the complete model number and any message before resetting power
- Stop for smoke, burning odor, gas odor, active water near electricity, or repeated breaker trips
Stop for gas odor, smoke, damaged wiring, active leaks near electrical parts, or repeated breaker trips. Avoid internal gas, refrigerant, or live-voltage work and arrange professional service.
Common causes behind the symptom
The leak-protection system has detected water
Water in the base, a stuck float, foaming, or a sensor and electrical path state may keep the drain pump running. The source must be identified only after the protection state is cleared.
A pressurized or internal water path is leaking
A supply fitting, tube, valve, dispenser, or ice-maker fill path may release water continuously or only during a request. The highest wet point must be found only after a lower assembly is blamed.
The inlet valve is not controlling water correctly
A valve may fail to open, deliver too little water, or seep after the module removes power. The timing and location of water help separate a valve state from a supply restriction.
Defrost or wash water cannot reach the drain
A restricted hose, drain path, filter area, check valve, or pump may hold water where the module does not expect it. The location and cycle stage narrow the obstruction.
A control or wiring path is interrupted
Relays, connectors, harnesses, user controls, and power-supply circuits may prevent a working assembly from receiving the correct command. Voltage and continuity tests must follow the model electrical path information.
Read the operating pattern before resetting
An E15-type protection state commonly requires checking why water or a float signal is present, not merely clearing the display. The cycle stage, visible leak location, recent detergent use, and whether the pump runs continuously guide the inspection.
Document the active zone, cavity, compartment, or cycle when the dishwasher shows an E15 error. Include the exact display state and recent power, cleaning, plumbing, or installation events before attempting a reset.
What a complete diagnosis should confirm
Service should inspect the base safely, locate the highest leak point, and test fill level, valves, hoses, pumps, seals, spray patterns, foaming, float sensing, wiring, and control behavior. Tilting the appliance can hide evidence and spread water.
Thermador diagnosis must distinguish the leak-protection system has detected water, a pressurized or internal water path is leaking, the inlet valve is not controlling water correctly, defrost or wash water cannot reach the drain, a control or wiring path is interrupted. Model-specific readings from sensors, modules, loads, and the electrical path provide the evidence for repair; a displayed symptom by itself does not.
Model and installation details change the repair
Thermador dishwasher code interpretation and access can vary by model. Provide the complete model plus the exact characters displayed rather than assuming every similar-looking code has one cause.
Stop use and shut off water for an active leak. Disconnect power only when safe to do so without contacting wet electrical areas; protect cabinetry and flooring while arranging prompt service.
Frequently asked questions
What can cause this Thermador dishwasher problem?
Thermador products can reach this symptom through the leak-protection system has detected water, a pressurized or internal water path is leaking, the inlet valve is not controlling water correctly, defrost or wash water cannot reach the drain, a control or wiring path is interrupted. The affected functions, sequence, and model-specific readings show which path is actually present.
Should I reset this Thermador appliance before service?
Document the active zone, cavity, compartment, or cycle when the dishwasher shows an E15 error. Include the exact display state and recent power, cleaning, plumbing, or installation events before attempting a reset. One reset described in the exact user guide may be reasonable after a power event, but repeated resets can conceal an intermittent fault.
Can I keep using the appliance?
Stop use and shut off water for an active leak. Disconnect power only when safe to do so without contacting wet electrical areas; protect cabinetry and flooring while arranging prompt service.
What information helps the technician prepare?
Provide the full model number, installation type, the first failed function, any code or alarm exactly as displayed, and the photos or temperature notes described above. Thermador dishwasher code interpretation and access can vary by model. Provide the complete model plus the exact characters displayed rather than assuming every similar-looking code has one cause.
Ghost Appliance Repair is an independent service company and is not affiliated with or endorsed by Thermador or its manufacturer.