---
title: "Bertazzoni range hood: A flashing display on a KG hood — the filters, not the motor"
description: "Bertazzoni range hood: A flashing display on a KG hood — the filters, not the motor: bertazzoni range hood — an indicator rather than a code."
url: "https://bertazzonimiami.support/error-codes/signal-filter-alarm-kg-range-hood/"
date_modified: "2026-08-27"
Appliance type: "Range hoods and ventilation"
---


# Bertazzoni range hood: A flashing display on a KG hood — the filters, not the motor

### This is an indicator, not an error code

The filter saturation alarm. On these hoods the display item C flashes alternating with F when the grease filters need washing, and alternating with C and F when the charcoal filters need replacing on a hood running in recirculation.

It is on this page because it is what somebody is actually looking at when they go searching. Most of this maker’s equipment publishes no code at all, and an appliance that flashes at you is still telling you something — it simply is not telling you a number.

People find this page looking for why the **Bertazzoni range hood lights** are flashing. They are not reporting a failure; they are reporting a filter interval.

### What to do

- Wash the grease filters. They are metal and they go in the dishwasher.
- Replace the charcoal filters if the hood recirculates rather than ducts outside — charcoal cannot be washed or regenerated.
- Reset the alarm afterwards, or it goes on flashing at a hood with clean filters in it.
- This is the maker telling you to clean something, not the hood failing. A hood that is also pulling badly is a separate question and it is usually the ducting.

### What the repair is

Conditions like this one end at [Range hood ducting & airflow service](https://bertazzonimiami.support/services/range-hood-ducting-and-airflow-service/) more often than anywhere else. The figure on that page is a starting point; the exact cost is confirmed after an on-site diagnostic and agreed in writing before anything is opened.

KG series hoods

What the machine is telling you

This is an indicator, not an error code

The filter saturation alarm. On these hoods the display item C flashes alternating with F when the grease filters need washing, and alternating with C and F when the charcoal filters need replacing on a hood running in recirculation.

It is on this page because it is what somebody is actually looking at when they go searching. Most of this maker’s equipment publishes no code at all, and an appliance that flashes at you is still telling you something — it simply is not telling you a number.

People find this page looking for why the Bertazzoni range hood lights are flashing. They are not reporting a failure; they are reporting a filter interval.

What to do

Wash the grease filters. They are metal and they go in the dishwasher.

Replace the charcoal filters if the hood recirculates rather than ducts outside — charcoal cannot be washed or regenerated.

Reset the alarm afterwards, or it goes on flashing at a hood with clean filters in it.

This is the maker telling you to clean something, not the hood failing. A hood that is also pulling badly is a separate question and it is usually the ducting.

What the repair is

Conditions like this one end at Range hood ducting & airflow service more often than anywhere else. The figure on that page is a starting point; the exact cost is confirmed after an on-site diagnostic and agreed in writing before anything is opened.

---

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