Bertazzoni Range Hoods GREASE-FILTER-40H Error: Grease filter reminder 40h
What Does GREASE-FILTER-40H Mean? GREASE-FILTER-40H is a maintenance reminder on Bertazzoni range hoods — not a fault. After 40 cumulative hours of fan operation, the speed-1 indicator light (B) begins flashing to remind you that the aluminum mesh grease filters are due for cleaning. The hood continues to work normally at all speeds while the […]
Quick Assessment
Answer to continue safely
Is it safe to keep using?
No. This is a routine maintenance reminder. The hood is fully operational while the indicator is flashing — clean the filters at your earliest convenience to maintain optimal airflow and suction performance.
Can I reset the code?
Yes. Press B and C simultaneously with the fan motor off to reset the 40-hour counter. The indicator will extinguish immediately on a successful reset.
When to stop immediately?
Stop if you notice: Grease dripping from the hood body during cooking — filters are severely overdue for cleaning, Smoke from the hood motor area — a grease-soaked filter can ignite if heat is sufficient.
Symptoms You May Notice
Airflow from the hood feels reduced and cooking odours linger longer than usual
As the aluminum mesh grease filters approach saturation, captured grease builds up in the mesh weave and progressively restricts airflow through the hood, reducing its effectiveness at clearing cooking smoke and odours.
Speed-1 button indicator light (B) flashes continuously while fan is off
The flashing LED acts as a maintenance reminder only — it does not indicate any component failure and the hood continues to operate at all speeds.
Indicator persists until filters are cleaned and alarm is reset by pressing B and C simultaneously
The reminder counter does not reset automatically after cleaning — the owner must press the B and C buttons simultaneously with the fan motor off to acknowledge the maintenance and restart the 40-hour counter.
Possible Causes
40 cumulative operating hours elapsed since last filter cleaning
The hood's internal hour counter has reached the 40-hour maintenance threshold — this is the designed reminder interval for aluminum mesh grease filter cleaning under normal cooking conditions.
DIY PossibleGrease filters saturated with accumulated cooking grease
Heavy cooking with high grease output — frying, searing, or prolonged stovetop cooking — can saturate filters faster than the 40-hour reminder cycle, making the airflow reduction noticeable before the indicator triggers.
DIY PossibleSafe Checks You Can Do
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1
Remove and clean the aluminum mesh grease filters
Switch the hood motor off, release the filter locking clips, and slide the aluminum mesh filters out of the hood. Soak the filters in hot water with a degreasing dish soap for 10 minutes, then rinse under hot running water and allow them to dry completely before reinstalling.
Bertazzoni aluminum mesh filters are dishwasher-safe on the lower rack at normal wash temperature — this is the easiest cleaning method and is confirmed in the KG90CONX and KIN-series manuals.
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2
Reset the filter reminder counter
With the hood fan motor switched off and the filters reinstalled, press and hold the B (speed-1) and C (speed-2) buttons simultaneously for 2–3 seconds until the flashing B indicator extinguishes, confirming the 40-hour counter has been reset.
If the indicator does not extinguish after the button press, confirm that the fan motor is fully off — the reset only functions when the motor is stopped.
When to Call a Professional
Contact a qualified technician if:
- Flashing indicator does not extinguish after the B+C reset with fan off
- Hood control board does not acknowledge the reset on any button combination
Need Professional Help?
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