Step-by-Step DIY Fix Guide
- SAFETY: Disconnect power at the breaker.
- Open the dispenser door and clean out any hardened detergent with a damp cloth.
- Manually open and close the dispenser door several times to check for physical binding.
- Restore power and run a short cycle. If E19 persists, the solenoid or control board needs replacement.
If the warning comes back after restart
- If airflow still seems weak after the basic checks, the fan path or a deeper obstruction becomes more likely.
- If the warning returns immediately after a clean restart, the sensor or wiring path becomes more likely than a one-time glitch.
- Dispenser is clean and unobstructed but E19 persists — solenoid replacement needed
What This Error Means
Error code E19 on your Thermador dishwasher indicates: There is a detergent dispenser solenoid circuit fault/error. The appliance detects this condition through its built-in sensors and halts the current cycle to prevent further damage. Depending on the model, the code may flash on the display panel, appear on a digital readout, or cause the status lights to blink in a specific sequence. The dishwasher will not resume normal operation until the underlying fault is resolved.
The most frequent cause of error E19 is failed detergent dispenser solenoid or actuator. When this happens, the dishwasher's control board detects the abnormal sensor reading or motor response and triggers the fault code as a protective measure. Other contributing factors are listed in the causes section below — working through them in order is the fastest path to a fix.
Many cases of error E19 can be resolved with DIY troubleshooting — start with the steps below before calling a technician. If the steps do not clear the code, the fault is deeper in the system and professional diagnosis will be needed. The guide specifies clearly at which point to stop DIY work.
The dishwasher will display E19 and refuse to start or continue a cycle until the fault is resolved. If the code appeared mid-cycle, there may be water standing in the tub — which is normal for this fault type. Do not attempt to restart the appliance without working through the troubleshooting steps below first.
Most Likely Cause by Symptom
The Thermador dishwasher may stop, pause, or refuse to complete the cycle normally.
Likely cause: Failed detergent dispenser solenoid or actuator
Check first: SAFETY: Disconnect power at the breaker.
The warning may return immediately because the appliance is detecting an internal fault.
Likely cause: Wiring fault between dispenser and control board
Check first: Open the dispenser door and clean out any hardened detergent with a damp cloth.
Common Causes
- Failed detergent dispenser solenoid or actuator
- Wiring fault between dispenser and control board
- Detergent buildup jamming the dispenser door mechanism
- Control board relay failure for the dispenser circuit
What Not to Do
- Do not run further cycles until the fault is resolved
Model and Display Variation Notes
Model-family notes
- Thermador dishwasher display wording and code formats can vary by series.
- If your model behaves differently, check the owner manual before trying any deeper maintenance step.
Display and panel differences
- Panel wording can vary by series, so confirm the exact code pattern before buying parts.
Parts, Tools and Service Options
Common parts
- Detergent dispenser assembly ($30–$75)
Manual and model check
Check your exact model and manual before ordering any Thermador dishwasher parts.
Service option
Thermador service visit if the warning returns after the basic checks are complete.
Suggestions in this section are organized to support the troubleshooting flow first. Any future affiliate relationships should be disclosed clearly.
When Not to Keep Troubleshooting
Dispenser is clean and unobstructed but E19 persists — solenoid replacement needed
How to Prevent It Recurring
- Use pods or tablets rather than gel detergent to prevent dispenser clogging
Related Error Codes
Extra notes
- This page is based on Thermador support material and stays conservative where model-specific guidance may vary.
- The goal is to help you identify safe first checks before you move into parts, service, or model-specific manual lookup.
Source and model notes
Last reviewed: 2026-04-09
Based on: Based on Thermador support material and edited into consumer-safe guidance for the exact code family on this page.
Model coverage note: Thermador dishwasher code meanings can vary by series, control panel, and model family, so use this page as a safe starting point rather than a replacement for the model-specific manual.
Important: FixThisError is an independent guide, not the manufacturer. Use your model-specific manual when the panel wording or behavior differs.
Always disconnect power before inspecting appliances. If unsure, contact a licensed appliance technician.