Grundig Control Logic or Sensor Misinterpretation

Unit frequently enters self-clean or flush mode without being commanded

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.

Possible Causes

Faulty water quality sensor, Stuck clean button on UI, Control board firmware issue, Electrical noise on sensor lines

Safety first: Unplug the unit before working on controls or sensors.

Steps to check:

Inspect control panel: Ensure the clean button is not physically stuck or damaged. Clean around the buttons.
Check water quality sensor: Clean or temporarily disconnect the sensor (if safe per service manual) to see if behavior changes.
Reset control: Perform a factory reset or power cycle to clear any software glitches.

If the issue persists, the main control board or UI may need replacement.

Medium 3/5

Grundig Water Quality Sensor

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