--- title: "Bosch custom insert GREASE FILTER key lit: 40 hours since the last cleaning" description: "What GREASE FILTER lit means on Bosch custom insert GREASE FILTER key lit: 40 hours since the last cleanings, what to check before booking, and when it is not a…" url: "https://rangehooderepair.center/error-codes/bosch-grease-filter-key-lit/" --- # Bosch custom insert GREASE FILTER key lit: 40 hours since the last cleaning The Bosch custom inserts HUI30253UC through HUI86553UC have separate keys for each filter reminder. ## What GREASE FILTER lit actually means. The Bosch custom inserts HUI30253UC through HUI86553UC have separate keys for each filter reminder. After 40 hours of operation the GREASE FILTER key lights and stays lit. Home Connect models can also push the reminder to a phone and show how far the count has run. Bosch range hood display · also shown as GREASE FILTER button illuminated What to do when GREASE FILTER lit 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 Custom Insert Hoods User Manual HUI34253UC, HUI30253UC, HUI36253UC, HUI80553UC, HUI86553UC Bosch custom insert hoods HUI30253UC, HUI34253UC, HUI36253UC, HUI80553UC and HUI86553UC. ## Before you book, in this order. Each step comes from Bosch's own guidance for GREASE FILTER lit on its range hoods. Follow it to the end: the last card says whether this is a visit. 01 Switch the insert off, let it cool, and take the metal filters out of the liner. 02 Clean them by hand or in the dishwasher, then refit them. 03 Hold the GREASE FILTER key for three seconds until it beeps to restart the 40-hour count. 04 Book a visit if the key stays lit after a proper 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 The lit key does not mean the blower is weak or failing. The CHARCOAL FILTER key is a separate reminder with a longer 120-hour count. ## What you may notice with it. The range hood problems GREASE FILTER lit 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 GREASE FILTER lit 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/) [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/) [Filter key flashes slowly at switch-off](https://rangehooderepair.center/error-codes/bosch-filter-key-flashing/) [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 > After 40 hours of operation, the GREASE FILTER button will illuminate indicating that the filters [Bosch Custom Insert Hoods User Manual HUI34253UC, HUI30253UC, HUI36253UC, HUI80553UC, HUI86553UC](https://media3.bsh-group.com/Documents/9001604433_A.pdf) [Bosch Custom Insert Hoods User Manual HUI34253UC, HUI30253UC, HUI36253UC, HUI80553UC, HUI86553UC](https://media3.bsh-group.com/Documents/9001604433_A.pdf) [Bosch Custom Insert Hoods User Manual HUI34253UC, HUI30253UC, HUI36253UC, HUI80553UC, HUI86553UC](https://media3.bsh-group.com/Documents/9001604433_A.pdf) Every code on this site is taken from the manufacturer's documentation, never from a forum or a parts listing. Bosch custom insert hoods HUI30253UC, HUI34253UC, HUI36253UC, HUI80553UC and HUI86553UC. ## Bosch GREASE FILTER lit 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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Switch the insert off, let it cool, and take the metal filters out of the liner. If it comes back, it needs a visit. ### Where are the filters on a Bosch custom insert? The insert sits inside your own wood or plaster hood, and its metal filters are on the underside of the liner. They come out from below without touching the outer hood. ### Does the Bosch insert count 40 hours even if I use low speed? Yes, it counts operating hours, not speed. Long runs on low fill the count just as quickly as short runs on boost. ### Can I see the Bosch filter count before the key lights? On Home Connect models the app shows the filter saturation status once the reminder is switched on in settings. --- **[Read on the site: Bosch custom insert GREASE FILTER key lit: 40 hours since the last cleaning](https://rangehooderepair.center/error-codes/bosch-grease-filter-key-lit/)** **[Book a visit with RangeHoodeRepair.center](https://rangehooderepair.center/schedule/)**