Neff [F] status codewhat it means

The single letter F belongs to the extractor half of a Neff venting hob, the induction hob with the downdraught fan in the middle of the glass, and it has nothing to do with the cooking zones. Neff’s support page for it is unambiguous: if the F light comes on, it indicates that the odour filter is saturated, or that the saturation indicator is still lit even after the filter has been replaced.

The odour filters are the activated-carbon cartridges inside the plinth unit that a recirculating venting hob uses instead of a duct to outside, and they have a service life measured in months of cooking. The hob counts fan hours and lights the F when the count says the carbon is spent; it does not smell anything, so the F will appear on schedule whether or not the kitchen has started to smell of last night’s dinner. Neff’s published solution is to replace the odour filters and reset the indicator, and to change the acoustic filters at the same time if they are dirty.

The reset sequence they give is short: switch the appliance off, fit the new filters, then press and hold the ventilation sensor until you hear a beep, at which point the F goes out. If the F stays lit after a genuine filter change, the reset step has been missed rather than the hob having failed, which is why their page covers both cases in one line. Ducted-out installations have no odour filters and should never show it.

1. 1

   Check the F is on the ventilation display and not in a cooking-zone display. A letter in a zone display is a different indication; the venting F sits with the fan-level indicator.

2. 2

   Switch the hob off. Lift out the central grease filter, then remove the four odour or acoustic filters beneath it and dispose of them.

3. 3

   Fit the new filters as Neff describe: two into the left and right and slide them forwards, then the other two into the left and right, then refit the grease filter.

   Use filters listed as compatible with your hob’s model number. Neff say to check compatibility before buying; the cartridges are not universal across the range.
4. 4

   Press and hold the ventilation sensor until the hob beeps. The F goes out and the saturation counter restarts.

5. 5

   While the grease filter is out, wash it. Neff publish a separate guide for cleaning it, and a clogged grease filter shortens the life of the carbon behind it.