Thermador Dishwasher Moderate Severity
E3400

E3400 – Dishwasher error code

Thermador Dishwasher error code

E3400 is an error code the Dishwasher uses to flag a condition the owner manual groups with controls, heating, water, or airflow. The same characters can mean different branches on different revisions, so the rating plate matters as much as the display.

If the code appears with clicking from the valve or fan area, note timing and frequency—mechanical and electrical causes read differently on site.

Call 844-683-0648 for Thermador Support—share the code, the appliance type, and any recent kitchen work or outages.

Call 844-683-0648 Reserve repair

At a glance

E3400 on Thermador

  • ApplianceDishwasher
  • SeverityModerate Severity
  • DIY checksTechnician advised

Book Thermador repair

Contact Thermador Support for repair at 844-683-0648—mention code E3400 when you call.

844-683-0648 Schedule appointment

Related service

Thermador Dishwasher Repair

OEM or manufacturer-cleared parts when available · invoice-backed coverage when applicable

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Before the visit

Quick troubleshooting steps

  • Note the exact error code and any indicators (sounds, smells, leaks).

  • Try power cycling the appliance (unplug for 60 seconds).

  • Review the diagnostics notes in the reference guide below.

  • If the code returns, call Thermador Support at 844-683-0648.

Professional service recommended. This error often involves electrical or sealed-system components. For safety, we recommend professional diagnostics before further use.

Reference guide

Thermador Dishwasher · code E3400

Code-specific guidance for E3400

E3400 is an error code the Dishwasher uses to flag a condition the owner manual groups with controls, heating, water, or airflow. The same characters can mean different branches on different revisions, so the rating plate matters as much as the display.

If the code appears with clicking from the valve or fan area, note timing and frequency—mechanical and electrical causes read differently on site.

Call 844-683-0648 for Thermador Support—share the code, the appliance type, and any recent kitchen work or outages.

What to track before you call

  • Exact timing: note which cycle step, mode, or temperature setting triggered E3400.
  • Repeatability: record whether the code returns immediately after reset or only under heavier demand.
  • Related symptoms: capture any unusual sounds, heat changes, leaks, smells, or electrical trips.
  • Model details: keep model and serial ready so we can route the right parts and test path.

Contact Thermador Support for repair

For Thermador Dishwasher repair and code E3400, call 844-683-0648 or use our schedule appointment page to reach the same dispatch team.

FAQ

Thermador service—answered clearly

Process, pricing, and what to expect during your visit.

If water remains, the door will not latch, or you see leaks, pause cycles and call. Note the code and whether drain or fill sounds abnormal—repeated runs can worsen water damage.

On some models UP relates to update or firmware state. Check the manual for whether to wait one cycle; if it persists or blocks washing, schedule service with model and serial.

Prefer to talk it through? Call Thermador Support.

844-683-0648
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