Er42
Bosch
Configuration / Parameter Error
Bosch induction cooktop displays Er42 and will not operate.
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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
Incorrect configuration after board replacement, Firmware mismatch, Corrupted EEPROM on control board
How to Fix / Troubleshooting
Safety first: Disconnect power before removing the cooktop from the counter.
- Power cycle: Turn off the breaker for 10 minutes, then restore power to see if the error clears.
- Check installation: If a control or power module was recently replaced, verify that the correct Bosch part number was installed for your model.
- Service mode (technician): Some models require configuration via service mode after board replacement. Refer to Bosch service documentation.
- Replace control: If configuration cannot be corrected, replace the main control module with the correct, pre-programmed part.
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Repair Difficulty
Professional Required
5/5
Required Part
Control Module
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