Thermador Uneven Heating / Poor Energy Distribution

Microwave runs but food heats unevenly; some spots are very hot while others are cold.

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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

Turntable not rotating properly,Turntable coupler slipping,Stirrer fan (mode mixer) not operating,Incorrect cookware or food placement

How to Fix / Troubleshooting

Safety first: Use only microwave-safe containers and avoid superheating liquids.

  • Step 1 – Verify turntable operation: Ensure the glass tray rotates smoothly during cooking. If not, inspect the roller ring and coupler for damage.
  • Step 2 – Check stirrer (qualified persons): Some Thermador models use a stirrer fan behind a ceiling cover. Remove the cover and verify the stirrer blade is intact and rotates freely.
  • Step 3 – Use proper cookware: Use round, microwave-safe dishes and arrange food in a ring pattern for more even heating.
  • Step 4 – Stir and rotate: Pause cooking to stir or rotate food manually for large or dense items.
  • Step 5 – Replace failed parts: If the stirrer motor is not running or the blade is damaged, replace the stirrer motor assembly.

Note: Uneven heating can be normal for some foods; compare with manufacturer cooking guidelines.

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Repair Difficulty

Medium 3/5

Required Part

Stirrer Motor
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