E3
Bosch
Overvoltage Protection
Bosch induction cooktop shows E3 and the affected zone will not heat.
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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
Line voltage above specification, Power surge from utility, Incorrect wiring (e.g., 3-phase miswired), Faulty power module voltage sensing
How to Fix / Troubleshooting
Safety first: High voltage conditions can be dangerous. If you suspect a supply issue, contact a qualified electrician.
- Power reset: Turn off the breaker for 5 minutes, then restore power. If E3 clears and does not return, it may have been a transient surge.
- Measure supply voltage: Have a licensed electrician verify that the supply voltage at the junction box is within Bosch specifications (typically 220–240V).
- Check wiring configuration: Confirm that jumpers and connections at the cooktop terminal block match the installation manual for your supply type.
- Module replacement: If supply voltage is correct and E3 persists, the power module voltage sensing circuit may be damaged and require replacement.
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Repair Difficulty
Hard
4/5
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