--- title: "Bertazzoni A key flashing fast: KPH charcoal filters are due" description: "What A key flashing every 0.5 seconds means on Bertazzoni A key flashing fast: KPH charcoal filters are dues, what to check before booking, and when it is not a…" url: "https://rangehooderepair.center/error-codes/bertazzoni-a-fast/" --- # Bertazzoni A key flashing fast: KPH charcoal filters are due On a KPH hood set up to recirculate, the control tracks charcoal filter use as well. ## What A key flashing every 0.5 seconds actually means. On a KPH hood set up to recirculate, the control tracks charcoal filter use as well. When that interval is up, the A key flashes quickly, roughly every half second. Bertazzoni range hood display · also shown as fast flashing A key What to do when A key flashing every 0.5 seconds 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 KPH36XT 36-inch wall hood user and installation manual Bertazzoni KPH36XT, KPH48XT, KPH362XT and KPH482XT wall hoods. The manual lists charcoal filter code 901612 and replacement at least every four months. ## Before you book, in this order. Each step comes from Bertazzoni's own guidance for A key flashing every 0.5 seconds on its range hoods. Follow it to the end: the last card says whether this is a visit. 01 Remove the grease filters to reach the charcoal filters. 02 Replace the charcoal filters, or wash them if your kit is the washable type. 03 Refit everything and hold A for about five seconds until it stops flashing. 04 If the fast flash returns straight away, book a visit. ### 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 The fast flash does not point to a problem with the blower or the lights. It only matters on recirculating KPH hoods; the slow flash is the grease filter reminder. ## What you may notice with it. The range hood problems A key flashing every 0.5 seconds 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 A key flashing every 0.5 seconds 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 F](https://rangehooderepair.center/error-codes/bertazzoni-c-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/) [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 the A key flashes with a 0.5 second frequency the active carbon filters must be replaced [Bertazzoni KPH36XT 36-inch wall hood user and installation manual](https://us.bertazzoni.com/downloads/11571/8309/libr.KPH36XT.pdf?act=download) [Bertazzoni KPH36XT 36-inch wall hood user and installation manual](https://us.bertazzoni.com/downloads/11571/8309/libr.KPH36XT.pdf?act=download) Every code on this site is taken from the manufacturer's documentation, never from a forum or a parts listing. Bertazzoni KPH36XT, KPH48XT, KPH362XT and KPH482XT wall hoods. The manual lists charcoal filter code 901612 and replacement at least every four months. ## Bertazzoni A key flashing every 0.5 seconds 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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Remove the grease filters to reach the charcoal filters. If it comes back, it needs a visit. ### How can I tell the two A key flashes apart on my Bertazzoni? Count them: about one flash every two seconds is the grease filter reminder, about two flashes a second is the charcoal one. ### Which charcoal filter fits a Bertazzoni KPH hood? The KPH manual lists code 901612 for the non-regenerable charcoal filters. ### My Bertazzoni KPH hood is ducted outside. Why the fast flash? The control may still count charcoal time. Reset it with A; if it keeps returning, book a visit to check the setup. --- **[Read on the site: Bertazzoni A key flashing fast: KPH charcoal filters are due](https://rangehooderepair.center/error-codes/bertazzoni-a-fast/)** **[Book a visit with RangeHoodeRepair.center](https://rangehooderepair.center/schedule/)**