Er55
Siemens
Internal Software / Firmware Error
Induction cooktop displays Er55 and will not start any zone
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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 firmware, Failed microcontroller on main board, Power surge event, Incompatible replacement board
How to Fix / Troubleshooting
Safety first: Disconnect the cooktop from mains power.
User step:
- Leave power off for 10–15 minutes, then restore to attempt a reset.
Technician step:
- Replace or reprogram the main control board using Siemens-approved parts and procedures.
This is not user-serviceable and requires Siemens service tools.
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Repair Difficulty
Professional Required
5/5
Required Part
Main Control Board
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