E6
Thermador Internal Communication Error Between User Interface and Power Module

Induction cooktop displays E6 and may shut down all zones.

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Safety Warning

This repair may involve working with high voltage components or water connections. Always unplug the appliance before removing any panels.

If you are not confident in your ability to perform this repair safely, we strongly recommend contacting a professional technician.

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Possible Causes

Loose harness between UI board and power module, Corroded connectors, Failed user interface board, Failed main power module

How to Fix / Troubleshooting

Safety first: Disconnect power at the breaker before removing any panels.

  • Power cycle: Turn off power for 5 minutes, then restore. Sometimes E6 is a transient communication error.
  • Check for moisture: Inspect around the control area for signs of liquid intrusion. Spills can short communication lines.
  • Internal harness check (advanced): Remove the cooktop and bottom cover. Locate the multi-pin harness between the UI board and the main power module. Disconnect and reconnect the harness to clean the contacts. Look for bent pins or corrosion.
  • Inspect boards: Look for burnt or cracked components on both the UI and power boards.

If reseating the harness does not resolve E6, either the user interface board or the main power module will need replacement. In many cases, technicians replace the module that shows visible damage or follow Thermador diagnostic procedures to isolate the faulty board.

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Repair Difficulty

Hard 4/5

Required Part

User Interface Board
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