Neff oven E8401 error code
What E8401 means on a Neff oven
Control board fault.
Meaning checked by NAC's engineers, 9 November 2026.
What our engineers say
When a Neff oven shows error code E8401, it is reporting a fault with its control board, the electronic board that runs the oven. You may find the oven will not turn on, and an alarm can sound as soon as the power is switched on.
Engineers sometimes find that the main control board has burnt, and in that case the display board that works alongside it may need replacing too.
An engineer will usually start by checking that the code appears as soon as the oven is switched on, then look over the control board for damage and test the other parts to make sure the fault lies with the board. The repair usually means fitting a new control board, and sometimes a new display board as well, each set up for your oven, before testing that everything works properly. These boards often have to be ordered, so the engineer may need to come back on a second visit to fit them and finish the repair.
Written by our engineers from NAC's own jobs.
Faults this code turns up with
What our engineers found and fixed for each, from NAC's own repair records.
What we fixed. We'll add what our engineers found, the parts they fitted and what customers typically paid once enough of these repairs are confirmed. How we work out our figures.
Before you check anything yourself
- Switch the oven off and unplug it, or turn it off at the isolator switch, before you touch anything. Our guide to safely isolating an appliance walks you through it.
- An error code tells you where to look, not that it's safe to take the oven apart. Don't remove panels or covers to get at the parts it points to: that's an engineer's job.
- If it involves the mains supply, sealed parts, or you're not confident at any point, stop and book a qualified engineer rather than risk injury or further damage.
- If it's a gas appliance and you can smell gas, don't use it. Open the windows and call the National Gas Emergency Service on 0800 111 999.
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