--- title: "Bertazzoni C and F alternating: the charcoal filters on a KG hood are due" description: "What C F means on Bertazzoni C and F alternating: the charcoal filters on a KG hood are dues, what to check before booking, and when it is not a failure at all." url: "https://rangehooderepair.center/error-codes/bertazzoni-c-f/" --- # Bertazzoni C and F alternating: the charcoal filters on a KG hood are due When a KG hood runs in recirculating mode, its charcoal filters wear out after a longer stretch of use than the grease filters. ## What C F actually means. When a KG hood runs in recirculating mode, its charcoal filters wear out after a longer stretch of use than the grease filters. The display then alternates between C and F to ask for a change of charcoal filters, and the grease filters should be washed at the same time. Bertazzoni range hood display · also shown as C and F alternating, C/F flashing What to do when C F shows on the range hood ### Kind of code Filter reminders The hood has counted enough hours of fan time to ask for its filters: the mesh or baffle grease filters want a wash, or on a recirculating hood the charcoal filters want replacing. Most hoods count hours rather than measure grease, so the light comes on whether the filters are clean or not, and it stays on until it is reset with the key the manual names. A reminder that returns straight after a reset, or a hood that still pulls weakly with fresh filters, is worth a visit. ### Usually leads to Range hood filter and baffle service Cleaning or replacing what catches grease and odor: mesh and baffle filters, charcoal pads on recirculating hoods, and the grease channel. ### Shows up as Reading a Range Hood Error Code or Blinking Light A range hood error code may appear as letters and numbers on a display, a light that blinks in a pattern, a filter reminder that will not clear, or a beep with the fan refusing to start. ### Make Bertazzoni A Bertazzoni range hood that has stopped pulling steam is inspected in your kitchen, beginning with the rating label hidden behind its grease filters. ### Source Bertazzoni KG30X 30-inch wall hood user and installation manual Bertazzoni KG30X, KG36X and KG48X wall hoods with the digital display, recirculating installations. ## Before you book, in this order. Each step comes from Bertazzoni's own guidance for C F on its range hoods. Follow it to the end: the last card says whether this is a visit. 01 Take out the grease filters and wash them. 02 Replace the charcoal filters with the kit listed for your KG model; they cannot be washed. 03 With everything back in place, hold button B for about five seconds until the display stops flashing. 04 If the alternating C and F returns within days, book a visit to check the control. ### Still there? It usually turns into [range hood filter and baffle service](https://rangehooderepair.center/services/range-hood-filter-and-baffle-service/). Book with the code and the model number. ### What not to do This reminder only matters on a KG hood set up to recirculate air back into the kitchen; on a ducted hood there is no charcoal to change. A steady C with the motor off is something else, the clean air mode, and not a filter request. ## What you may notice with it. The range hood problems C F tends to arrive with. Answer these at the range hood before anyone is booked. [All problems](https://rangehooderepair.center/problems/) Before you call ### [Reading a Range Hood Error Code or Blinking Light](https://rangehooderepair.center/problems/range-hood-error-code/) [All 7 causes, cheapest first](https://rangehooderepair.center/problems/range-hood-error-code/) It also comes with - [**Range Hood Runs but Barely Pulls Smoke**](https://rangehooderepair.center/problems/range-hood-weak-suction/) Problem ### Reading a Range Hood Error Code or Blinking Light 7 causes, cheapest first Where C F usually leads ## Range hood filter and baffle service. **Mesh or baffle filters, charcoal pads and the grease channel · lowest.** Book a visit [What the job involves](https://rangehooderepair.center/services/range-hood-filter-and-baffle-service/) ## Bertazzoni range hoods. A Bertazzoni range hood that has stopped pulling steam is inspected in your kitchen, beginning with the rating label hidden behind its grease filters. [Bertazzoni range hood repair](https://rangehooderepair.center/brands/bertazzoni/) More Bertazzoni codes [F](https://rangehooderepair.center/error-codes/bertazzoni-f/) [C](https://rangehooderepair.center/error-codes/bertazzoni-c/) [4](https://rangehooderepair.center/error-codes/bertazzoni-4/) [A key flashing every 2 seconds](https://rangehooderepair.center/error-codes/bertazzoni-a-slow/) [A key flashing every 0.5 seconds](https://rangehooderepair.center/error-codes/bertazzoni-a-fast/) [F and C keys flashing](https://rangehooderepair.center/error-codes/bertazzoni-f-c-keys/) [S1 steady](https://rangehooderepair.center/error-codes/bertazzoni-s1/) [S1 flashing](https://rangehooderepair.center/error-codes/bertazzoni-s1-flashing/) [T4 flashing](https://rangehooderepair.center/error-codes/bertazzoni-t4-flashing/) [T2 flashing](https://rangehooderepair.center/error-codes/bertazzoni-t2-flashing/) [T1 flashing](https://rangehooderepair.center/error-codes/bertazzoni-t1-flashing/) [Light B flashing](https://rangehooderepair.center/error-codes/bertazzoni-b-light-flashing/) [All 14 Bertazzoni codes](https://rangehooderepair.center/error-codes/#codes-bertazzoni) Filter reminders on other makes [BEST Fan LED bar flashes slowly for 30 seconds after the fan is turned off](https://rangehooderepair.center/error-codes/best-fan-led-bar-flashing-after-off/) [BlueStar Timer icon blinking, blower off](https://rangehooderepair.center/error-codes/bluestar-timer-icon-fan-off/) [Bosch clean grease filter](https://rangehooderepair.center/error-codes/bosch-clean-grease-filter/) [Dacor Low button blinking](https://rangehooderepair.center/error-codes/dacor-low-button-blinking/) [Elica Grease Filter](https://rangehooderepair.center/error-codes/elica-grease-filter/) [Faber Filter alarm LED on (steady)](https://rangehooderepair.center/error-codes/faber-filter-alarm-led-on/) [Falmec Red LED steady on with the fan off](https://rangehooderepair.center/error-codes/falmec-red-led-steady/) [Fisher & Paykel Filter button lit](https://rangehooderepair.center/error-codes/fisher-and-paykel-filter-button-lit/) [All 55 codes of this kind](https://rangehooderepair.center/error-codes/#family-filter) Bertazzoni builds this ### Wall-mount range hood The chimney hood fixed to a bare stretch of wall above the burners, its canopy catching the rising smoke while a telescoping cover hides the duct that climbs to the ceiling. Bertazzoni builds this ### Under-cabinet range hood The slim hood screwed to the bottom of the wall cabinet over the burners, venting up through that cabinet or back through the wall, or cleaning the air and returning it to the room. Bertazzoni builds this ### Island range hood The hood that hangs from the ceiling over burners set into a kitchen island, open on all four sides, with its duct and wiring hidden inside a chimney that drops from above. ## In Bertazzoni's own words > When display item C flashes, at a speed where it alternates with the letter C and F, the carbon filters must be replaced. [Bertazzoni KG30X 30-inch wall hood user and installation manual](https://us.bertazzoni.com/downloads/8666/5937/libr.KG30X.pdf?act=download) [Bertazzoni KG30X 30-inch wall hood user and installation manual](https://us.bertazzoni.com/downloads/8666/5937/libr.KG30X.pdf?act=download) Every code on this site is taken from the manufacturer's documentation, never from a forum or a parts listing. Bertazzoni KG30X, KG36X and KG48X wall hoods with the digital display, recirculating installations. ## Bertazzoni C F range hood repair, where we come out. The same visit in every metro below: the code, the model number, and a diagnosis before any part is ordered. 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Take out the grease filters and wash them. If it comes back, it needs a visit. ### My Bertazzoni KG hood vents outside. Why does it ask for charcoal filters? The control may still be counting for the charcoal reminder even on a ducted hood. Clear it with button B; if it keeps coming back, book a visit to check the control setup. ### How often does a Bertazzoni ask for charcoal filters? Less often than for grease filters; the exact interval depends on use. Bertazzoni's hood manuals put charcoal replacement at about every four months of use. ### Can I wash the charcoal filters from my Bertazzoni hood? No. The KG manual treats them as a part that is replaced, and washing ruins the charcoal. --- **[Read on the site: Bertazzoni C and F alternating: the charcoal filters on a KG hood are due](https://rangehooderepair.center/error-codes/bertazzoni-c-f/)** **[Book a visit with RangeHoodeRepair.center](https://rangehooderepair.center/schedule/)**