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.

Bertazzoni S1 flashing: KMC charcoal filter is due

When the charcoal alarm has been switched on, the KMC hood counts toward 200 working hours.

(844) 398-3217

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

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 hood

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.

01

Wash the grease filters.

02

Fit a new charcoal filter; it cannot be cleaned or regenerated.

03

With lights and blower off, hold T3 for about three seconds until S1 flashes three times.

04

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 problems

Where S1 flashing usually leads

Range hood filter and baffle service.

Mesh or baffle filters, charcoal pads and the grease channel · lowest.

In Bertazzoni's own words

The Activated Charcoal Filter saturation alarm comes into operation after the Hood has been working for 200 hours.
Bertazzoni KMC30X 30-inch canopy hood installation, use and care manual Bertazzoni KMC30X 30-inch canopy hood installation, use and care manual

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

Questions
about S1 flashing.

Can I clear S1 flashing myself?
Wash the grease filters. If it comes back, it needs a visit.
My Bertazzoni hood vents outside. Why does S1 flash?
The charcoal alarm is switched on. With the loads off, hold T4 for at least five seconds; the four LEDs flash once to show it is off.
How do I switch the charcoal reminder on for a recirculating Bertazzoni?
With the lights and blower off, hold T4 for about two seconds; the four key lights flash twice to confirm.
Do I need to wash the grease filters when S1 flashes?
Yes. Bertazzoni asks for the grease filters to be washed along with the charcoal change.

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.

(844) 398-3217 Schedule a repair