--- title: "Bosch under-cabinet hood filter key flashing for 30 seconds after switch-off" description: "What Filter key flashes slowly at switch-off means on Bosch under-cabinet hood filter key flashing for 30 seconds after switch-offs, what to check before…" url: "https://rangehooderepair.center/error-codes/bosch-filter-key-flashing/" --- # Bosch under-cabinet hood filter key flashing for 30 seconds after switch-off Bosch's newer under-cabinet hoods keep an hour counter for the filters. ## What Filter key flashes slowly at switch-off actually means. Bosch's newer under-cabinet hoods keep an hour counter for the filters. When cleaning is due, the reminder shows only at the moment you turn the hood off, as a slow 30-second flash of the filter key. It keeps doing this each time until it is reset during the flashing. Bosch range hood display · also shown as Clean filter reminder What to do when Filter key flashes slowly at switch-off 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 Bosch Bosch range hoods and downdraft vents get a home visit in which the touch controls and the fan's timed shut-off are checked before anything is opened. ### Source Bosch Undercabinet Hood User Manual (DUH and DUHP models) Bosch under-cabinet hoods DUH30253UC, DUH56353UC, DUH80553UC, DUH86553UC and pull-out models DUHP0853UC, DUHP6853UC (manual 8001296852). ## Before you book, in this order. Each step comes from Bosch's own guidance for Filter key flashes slowly at switch-off on its range hoods. Follow it to the end: the last card says whether this is a visit. 01 Clean the filters and the hood as the manual describes. 02 Turn the hood off so the key starts flashing again. 03 While it is flashing, press and hold the key until the flashing stops to reset the timer. 04 Book a visit if the reminder returns straight after a reset. ### 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 A flashing fan key during cooking is something else: the heat sensor has taken over the blower. The filter reminder only appears at switch-off. ## What you may notice with it. The range hood problems Filter key flashes slowly at switch-off 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/) - [**Grease or Oily Water Dripping From the Range Hood**](https://rangehooderepair.center/problems/range-hood-dripping-grease/) Problem ### Reading a Range Hood Error Code or Blinking Light 7 causes, cheapest first Where Filter key flashes slowly at switch-off 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/) ## Bosch range hoods. Bosch range hoods and downdraft vents get a home visit in which the touch controls and the fan's timed shut-off are checked before anything is opened. [Bosch range hood repair](https://rangehooderepair.center/brands/bosch/) More Bosch codes [clean grease filter](https://rangehooderepair.center/error-codes/bosch-clean-grease-filter/) [replace charcoal filter](https://rangehooderepair.center/error-codes/bosch-replace-charcoal-filter/) [Auto](https://rangehooderepair.center/error-codes/bosch-auto/) [End](https://rangehooderepair.center/error-codes/bosch-end/) [Snd](https://rangehooderepair.center/error-codes/bosch-snd/) [Able](https://rangehooderepair.center/error-codes/bosch-able/) [GREASE FILTER lit](https://rangehooderepair.center/error-codes/bosch-grease-filter-key-lit/) [CHARCOAL FILTER lit](https://rangehooderepair.center/error-codes/bosch-charcoal-filter-key-lit/) [CONNECT and 2 flashing](https://rangehooderepair.center/error-codes/bosch-connect-2-flashing/) [Two short beeps](https://rangehooderepair.center/error-codes/bosch-two-short-beeps/) [Fan key backlight flashes slowly](https://rangehooderepair.center/error-codes/bosch-fan-key-flashing/) Filter reminders on other makes [Bertazzoni F](https://rangehooderepair.center/error-codes/bertazzoni-f/) [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/) [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 58 codes of this kind](https://rangehooderepair.center/error-codes/#family-filter) Bosch 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. Bosch 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. Bosch 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 Bosch's own words > When it is time to clean the filters, the light of [Bosch Undercabinet Hood User Manual (DUH and DUHP models)](https://media3.bsh-group.com/Documents/8001296852_D.pdf) [Bosch Undercabinet Hood User Manual (DUH and DUHP models)](https://media3.bsh-group.com/Documents/8001296852_D.pdf) [Bosch Undercabinet Hood User Manual (DUH and DUHP models)](https://media3.bsh-group.com/Documents/8001296852_D.pdf) Every code on this site is taken from the manufacturer's documentation, never from a forum or a parts listing. Bosch under-cabinet hoods DUH30253UC, DUH56353UC, DUH80553UC, DUH86553UC and pull-out models DUHP0853UC, DUHP6853UC (manual 8001296852). ## Bosch Filter key flashes slowly at switch-off 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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Clean the filters and the hood as the manual describes. If it comes back, it needs a visit. ### Why does my Bosch under-cabinet hood only flash when I turn it off? That is when Bosch chose to show the reminder, so it does not distract you while cooking. You get 30 seconds to reset it. ### I missed the 30 seconds on my Bosch hood. Do I have to wait for the next reminder? No. Turn it on and off again; the key flashes again at the next switch-off, and you can hold it then. ### Does the Bosch pull-out hood use the same reminder? Yes. The DUHP pull-out models share the manual and the same slow flash at switch-off. --- **[Read on the site: Bosch under-cabinet hood filter key flashing for 30 seconds after switch-off](https://rangehooderepair.center/error-codes/bosch-filter-key-flashing/)** **[Book a visit with RangeHoodeRepair.center](https://rangehooderepair.center/schedule/)**