Neff oven shows E004, often when using the grill function
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.
Possible Causes
How to Fix / Troubleshooting
Safety first: Turn off power at the mains and allow the oven to cool fully before inspection.
- Test grill function: Select full grill and set a moderate temperature (if applicable). If E004 appears and the grill does not glow red, suspect the grill circuit.
- Visual inspection: Look at the grill element at the top of the cavity. Check for cracks, blisters, or burn marks.
- Access terminals: Remove the top cover or rear panel (depending on model) to access the grill element terminals. Check for loose or burnt connectors.
- Continuity test: Disconnect the grill element and measure resistance. A typical grill element is 20–40 Ω. Infinite resistance indicates failure.
- Check wiring harness: Follow the wires from the grill element back to the control board, looking for heat damage or chafing.
Replace the grill element if open-circuit or visibly damaged. If the element and wiring are good but E004 persists, the grill relay or main PCB may be defective and should be tested or replaced by a professional.