E4
Thor Kitchen
Induction Coil or IGBT Power Stage Failure
Induction cooktop shows E4 on a specific zone, no heating on that 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
Open or shorted induction coil, Failed IGBT transistor on power board, Burned coil wiring, Overheated power module
How to Fix / Troubleshooting
Safety first: Disconnect power at the breaker. High-voltage components inside can retain charge; wait several minutes before touching boards.
- Access internal components: Remove the cooktop from the counter and take off the bottom cover to expose the coils and power board.
- Inspect coil: Check the affected zone's coil for burn marks, broken windings, or melted insulation. Replace the induction coil module if damaged.
- Check wiring: Ensure the coil leads are firmly connected to the power board terminals.
- Board inspection: Look for cracked or burned components (especially IGBTs and resistors) on the power board. Replace the power module board if any damage is found or if E4 persists after coil replacement.
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Repair Difficulty
Professional Required
5/5
Required Part
Induction Power Module Board
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