

Bertazzoni S1 flashing: KMC charcoal filter is due
When the charcoal alarm has been switched on, the KMC hood counts toward 200 working hours.
Mon–Sat, 8am–8pm
- Filter reminders
- Range hood filter and baffle service
- Source: Bertazzoni
Book a visit
Three short steps, about a minute.
or call (844) 398-3217
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What S1 flashing
actually means.
When the charcoal alarm has been switched on, the KMC hood counts toward 200 working hours. At that point S1 flashes to say the charcoal filter must be changed and the grease filters washed as well.
Bertazzoni range hood display · also shown as S1 LED blinking
What to do when S1 flashing shows on the range hoodKind 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.
MakeBertazzoni
A Bertazzoni range hood that has stopped pulling steam is inspected in your kitchen, beginning with the rating label hidden behind its grease filters.
SourceBertazzoni KMC30X 30-inch canopy hood installation, use and care manual
Bertazzoni KMC30X, KMC36X and KMC48X canopy hoods, recirculating setup.
Before you book,
in this order.
Each step comes from Bertazzoni's own guidance for S1 flashing on its range hoods. Follow it to the end: the last card says whether this is a visit.
Wash the grease filters.
Fit a new charcoal filter; it cannot be cleaned or regenerated.
With lights and blower off, hold T3 for about three seconds until S1 flashes three times.
If the flashing does not stop after the reset, book a visit.
Still there?
It usually turns into range hood filter and baffle service. Book with the code and the model number.
What not to do
A flashing S1 appears only if the charcoal alarm was switched on with T4, which is meant for recirculating installations. A steady S1 is the shorter grease-filter reminder.
What you may
notice with it.
The range hood problems S1 flashing tends to arrive with. Answer these at the range hood before anyone is booked.
All problemsWhere S1 flashing usually leads
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 repairMore Bertazzoni codes
Filter reminders on other makes
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.
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.
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
The Activated Charcoal Filter saturation alarm comes into operation after the Hood has been working for 200 hours.
Every code on this site is taken from the manufacturer's documentation, never from a forum or a parts listing. Bertazzoni KMC30X, KMC36X and KMC48X canopy hoods, recirculating setup.
Bertazzoni S1 flashing 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 areasTampa BayFL · 31 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
Questions
about S1 flashing.
Can I clear S1 flashing myself?
My Bertazzoni hood vents outside. Why does S1 flash?
How do I switch the charcoal reminder on for a recirculating Bertazzoni?
Do I need to wash the grease filters when S1 flashes?
Back to your everyday
Still showing S1 flashing?
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.