E08
Blomberg Control Board Communication Error

Microwave displays E08 and will not accept new cooking commands.

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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

Loose wiring harness between display PCB and main control PCB,Defective main control board,Defective display/control interface board,Power surge damage

How to Fix / Troubleshooting

Safety: Disconnect power before removing the control panel or top cover.

Basic steps:

  • 1. Power reset: Unplug the microwave for at least 5 minutes. Plug back in and check if E08 clears.
  • 2. Check outlet and surge protection: Ensure the microwave is connected to a properly grounded outlet. If E08 appeared after a storm or power outage, a surge may have damaged the electronics.

Advanced steps:

  • 3. Inspect wiring harnesses: Remove the control panel and verify that all multi-pin connectors between the display board and main control board are fully seated and free of corrosion.
  • 4. Look for board damage: Examine both PCBs for burn marks, swollen components, or cracked solder joints.
  • 5. Replace control board(s): If wiring is intact and E08 persists, the main control board or display board may need replacement. Follow Blomberg service procedures for your specific model.
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Repair Difficulty

Hard 4/5

Required Part

Main Control Board
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