E13
Blomberg Alarm Circuit / Buzzer Fault

E13 error; alarm may sound continuously even when temperature is normal and door is closed.

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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

Stuck alarm button or touch key, Faulty alarm buzzer on display PCB, Shorted alarm output on main PCB, Software glitch after power interruption

How to Fix / Troubleshooting

Safety first: Disconnect mains power before working on the control panel.

Reset attempt:

  • Unplug the freezer for 10 minutes, then reconnect. Sometimes an alarm circuit can latch and be cleared by a full power reset.

Inspect control panel:

  • Remove the fascia to access the display PCB and alarm button area.
  • Check that the alarm button is not physically stuck or contaminated with spills.
  • Clean around the button with a soft cloth and isopropyl alcohol if needed.

Check buzzer and circuitry:

  • Locate the buzzer on the display PCB.
  • Inspect for corrosion or damage; a shorted buzzer can trigger E13.

Corrective actions:

  • Replace display PCB: If the buzzer or alarm button circuit is defective, replace the user interface/display board with a Blomberg-compatible part.
  • If the display board is good but E13 persists, the main control board alarm output may be faulty and require replacement.

Test: Restore power and verify that the alarm only sounds under actual fault conditions (high temperature, door open) and that E13 is cleared.

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Repair Difficulty

Medium 3/5

Required Part

User Interface / Display PCB
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