How do I change the language in Neff B6774? - Neff Ovens

See Troubleshooting section of manual on page 25. It may help

untitled (neff-international.com)

I can only confirm that the is no D4 Error shown anywhere. If Neff, the maker can't tell you what the error is, then surely no-one can. Very poor show. I think I would be cutting my losses and go back to a traditional cooktop from a different maker and pursue a legal case against Neff. They should change their name to 'Naff'.

NEFF appliances are among the most durable and reliable kitchen devices on the UK market. But every once in a while, a NEFF appliance will throw an error code for you to deal with.
When a fault code is displayed on your NEFF appliance, it indicates a problem, but not what that problem is or what has caused it. An appliance fault code simply detects and indicates the nature of the issue and provides the general area where investigations need to be carried out.
Bear in mind that on many occasions, your NEFF appliance will be in need of professional repair from a certified electrician to get guaranteed results.
So, if :

• You have a problem with your NEFF appliance
• You want to know what a specific error code means
• You want to trace and correct faults in your NEFF appliance

Then, read on.
NEFF appliances fault codes and their importance Your NEFF appliance will indicate an error code if it has a problem. This will be shown on the digital display and will be a single letter followed by one or two numbers. You can use this appliance error code to help identify where the problem is occurring. The most common appliance fault codes are related to defective oven elements, drainage issues on washing machines, and blocked pumps in dishwashers.
A detailed look at NEFF appliance error codes

NEFF induction hob error codes The most common faults of a NEFF induction hob are:

• The hob not starting up;
• The hob shutting off during cooking;
• The hob flashing after finishing cooking;
• The hob making a noise;
• Food isn't cooking evenly.

NEFF induction hob error codes that may help you locate the source of the problem are shown here:

• F1 - Tnsuitable cookware is being used, or there's no cookware in the zone;
• F2/F02/F4/F04- Tour appliance hasn't cooled down completely;
• F8/F08 - If your hob has been working on high power for a long time, the timeout will activate;
• E9 - There's an internal fault with your appliance electronics.

Bear in mind that most of the issues will require a certifed induction hob engineer to complete the job and fix your NEFF appliance.

https://www.manualslib.com/products/Neff-B-1442-6084937.html


NEFF 1442 Manuals

Sounds like a fried control board unfortunately:
This vid may not be specifically for a Neff but it may help...

Model No.?

All the red stripes on one side, single (if you look carefully should have a black fleck in the cream cord type covering) on the other side.

I would have gone straight through Neff. If it can't be fixed, your'e supposed to get a new oven out of the deal.

pull of control knob first, remove oven from housing and remove top panel undo 2 screws holding selector to fascia withdraw it back into top and change wires there will be quite a few dont get them mixed up! reverse to reassemble.

press the SSS button on the left hand side (this is next to the cC button) for 5 seconds you will see a list of languages By David Allen in Bolton

good day,
hope this link below will solve your problem.

kitchen appliances