E11
Grundig Internal Data / Calibration Error

E11 error, often associated with rapid temperature fluctuations or incorrect temperature display.

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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

Corrupted EEPROM on main PCB, Incorrect sensor calibration data, Power surge affecting control memory, Faulty main control PCB

How to Fix / Troubleshooting

Safety first: Disconnect mains power before accessing electronics.

Steps:

  • Power reset: Unplug the freezer for at least 10 minutes to allow the control to fully power down, then reconnect.
  • Factory reset (if available): Some Grundig models allow a factory reset via button combinations (refer to user manual). Perform this to reload default calibration.
  • Check sensors first: Verify that all temperature sensors (freezer, evaporator, ambient) are functioning and within expected resistance ranges. A bad sensor can trigger calibration errors.
  • Replace main PCB: If E11 persists and sensors are good, the EEPROM or microcontroller on the main PCB is likely faulty. Replace the main control PCB with the correct Grundig part.
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Repair Difficulty

Hard 4/5

Required Part

Main Control PCB
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