A complaint, not a parts verdict
“The oven runs without heat” can point towards the selected mode, an element or heat control. These are assessment areas for a oven; they do not identify a failed part on your particular NEFF model.
A fan oven running cold, a grill not heating and uneven cooking need different records. Mention each function you used normally rather than performing new tests.
The detail to keep with this complaint
Write down whether the fan, light and grill respond independently. Use observations already made during normal operation. Keep the setting and the result in separate sentences so they can be compared.
The cavity, mode and temperature selected
Which lights, fans or grill functions responded
The cooking result or point where power stopped
Describe the pattern over time
If the change is intermittent, record when it happened during ordinary use. Do not keep starting an unsafe appliance to make the fault recur for an engineer.
Which NEFF version is it?
Photograph a visible label around the door opening. For two cavities, keep the overall model and specify upper or lower oven rather than sending only a fascia photograph.
Keep the whole identification together with “the oven runs without heat”. A manufacturer name, an approximate purchase year or a familiar fascia does not establish that two oven versions have the same internal parts.
Compare like-for-like observations
Mention whether the change followed the same setting and normal load as before. Changing several settings at once makes the description harder to interpret.
What is around the appliance?
Built-in, built-under and high-level installations involve different access. Say where the oven is mounted and leave cabinet fixings and electrical connections undisturbed.
Discuss the next step
Include your complete postcode and the NEFF product details. Suitable work, charges, appointment availability and parts are confirmed individually. For the wider appliance context, return to the NEFF oven guide.
Bring the details together
Complete only what you know. The notes remain in this page until you copy them; opening the booking service does not send these notes automatically.