Klarstein Keep Warm Temperature Control Fault

Keep Warm function does not maintain temperature; food becomes cold or continues to cook vigorously.

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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

Incorrect temperature sensor readings, Firmware bug in keep-warm mode, Stuck relay controlling low-power heating, Calibration drift

How to Fix / Troubleshooting

Safety: Unplug before internal inspection.

Step 1 – Functional test:

  • Measure the temperature of water in keep-warm mode with a kitchen thermometer.
  • If it is far below or above the expected range (typically 60–75°C), suspect a control issue.

Step 2 – Sensor check:

  • Test the bottom NTC sensor and replace if out of spec.

Step 3 – Control board:

  • If sensor is fine, the keep-warm control circuit on the main control PCB may be faulty; replace the board.
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Repair Difficulty

Medium 3/5

Required Part

Main Control PCB
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