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A stainless baffle grease filter half slid out of the underside of an under-cabinet range hood, a small filter symbol glowing on the hood's control strip.

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.

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Mon–Sat, 8am–8pm

  • Filter reminders
  • Range hood filter and baffle service
  • Source: Bosch

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or call (844) 398-3217

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 codeFilter 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 toRange 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 asReading 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.

MakeBosch

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.

SourceBosch 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. 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

Before you call

Reading a Range Hood Error Code or Blinking Light

All 7 causes, cheapest first

It also comes with

Close view of the front control strip of a stainless wall-mount chimney range hood on a tiled wall, a few abstract lit segments on its small display and one indicator blinking, the range hood's canopy filling the upper half of the frame. 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

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

More Bosch codes

clean grease filterreplace charcoal filterAutoEndSndAbleCHARCOAL FILTER litCONNECT and 2 flashingTwo short beepsFilter key flashes slowly at switch-offFan key backlight flashes slowly

Filter reminders on other makes

Bertazzoni FBEST Fan LED bar flashes slowly for 30 seconds after the fan is turned offBlueStar Timer icon blinking, blower offDacor Low button blinkingElica Grease FilterFaber Filter alarm LED on (steady)Falmec Red LED steady on with the fan offFisher & Paykel Filter button lit
All 58 codes of this kind
A stainless steel wall-mount chimney range hood fixed to a white subway tile wall in a US home kitchen, the range hood's rectangular chimney cover rising straight to the ceiling, soft steam rising from a pot into the canopy, the range hood filling the upper half of the frame, the cooking surface below cropped and out of focus at the bottom edge. 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.

 A slim stainless under-cabinet range hood mounted beneath white shaker wall cabinets in a US home kitchen, the range hood's two lamps glowing onto steam rising from a simmering pot, the range hood and the cabinets above it filling the upper half of the frame, the cooking surface below cropped and out of focus. 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.

 A large stainless island range hood hanging from the ceiling on its four-sided chimney over a kitchen island with a white stone top in a US home, steam rising from a pan into the range hood's canopy, the range hood centered in the upper half of the frame, the burners on the island below cropped and out of focus. 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 Bosch Custom Insert Hoods User Manual HUI34253UC, HUI30253UC, HUI36253UC, HUI80553UC, HUI86553UC Bosch Custom Insert Hoods User Manual HUI34253UC, HUI30253UC, HUI36253UC, HUI80553UC, HUI86553UC

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.

All service areas

Tampa BayFL · 31 areas

OrlandoFL · 30 areas

Miami / South FloridaFL · 47 areas

New York MetroNY · 75 areas

HoustonTX · 36 areas

ChicagoIL · 50 areas

Los AngelesCA · 95 areas

San DiegoCA · 31 areas

San Francisco Bay AreaCA · 74 areas

A family cooking together under a stainless range hood in a bright kitchen.
For the heart of your home.

Questions
about GREASE FILTER lit.

Can I clear GREASE FILTER lit myself?
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.

Back to your everyday

Still showing GREASE FILTER lit?

Three things make the booking useful: the letters or blink pattern exactly as they showed, the full model number from the label behind the filters, and whether the fan still moves air on every speed. With those, the technician arrives with half the answer already worked out.

Schedule a repair Call (844) 398-3217
(844) 398-3217 Schedule a repair