Bertazzoni KMC Chimney Hood LED: S1 steady or flashing for filter saturation

What S1 LED steady / flashing means

On Bertazzoni KMC30X, KMC36X and KMC48X chimney hoods, the S1 LED signals filter saturation. A steady S1 is the metal grease filter alarm after 100 working hours: wash the filters. A flashing S1, if the charcoal alarm is enabled, means the activated charcoal filter is saturated after 200 hours: change it and wash the grease filters. The owner sees only the LED while the hood keeps running.

Common causes of S1 LED steady / flashing

100 working hours since the last reset (steady S1)
200 working hours with the charcoal alarm enabled (flashing S1)
The reminder not reset after the filters were serviced

✓ One safe check you can try

1. Switch the motor and lights off. 2. Wash the metal grease filters and let them dry. 3. Replace the charcoal filter if S1 was flashing. 4. Hold the reset for about 2 seconds with the motor and lights off. 5. If S1 returns at once, call us.

! Why to stop there

Clogged filters reduce suction and raise fire risk.
Charcoal filters must match the model.
Wiring above the hood is live.

Opening a panel yourself does not automatically cancel a manufacturer warranty, but it can cause accidental damage, and some manufacturers set their own service conditions. Check your warranty terms, or ask us, before deciding.

→Same appliance

Other Range Hood codes

A key flashing (2 s / 0.5 s)Bertazzoni KPH Hood Light: A key blinking slowly or quickly for filter service Display C flashing alternating with F / with C and FBertazzoni KG Hood Display: C blinking with F or C and F for filter service Light B flashing (motor off)Bertazzoni KG Hood Light: B blinking after 40 hours for mesh filter cleaning Light C flashing (motor off)Bertazzoni KG Hood Light: C blinking after 120 hours for charcoal filter replacement Red LED steady (filter alarm)Bertazzoni KIN30 PRO X Hood Insert Light: steady red LED filter alarm

S1 LED steady / flashingS1 LED steady / flashing questions

What is the difference between steady and flashing?

A steady S1 means wash the metal grease filters. A flashing S1 means replace the activated charcoal filter and wash the grease filters as well.

How do I reset it?

Hold the reset for about 2 seconds with the motor and lights off. The LED goes out and the hour count restarts from zero, ready for the next grease or charcoal reminder.

Is the charcoal alarm always on?

Only if it is enabled on your hood. Otherwise you will see just the steady grease alarm after 100 working hours, and the flashing charcoal reminder will not appear at all.