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E20 on the display
Some Bertazzoni cooktops have a cooling fan under the glass that starts when the electronics warm up. Owners notice it as a whoosh from the cabinet, which usually fades soon after use. The fan moves air over the electronics so they stay within their working range. When E20 appears alongside a fan that roars, runs for many minutes after shutdown, or sounds rough, we pay attention to the air path. Note how long it runs and how loud it is relative to normal.
Why the exact model matters
E20 is not confirmed as having one definition on every cooktop, and gas models have no such fan at all. For induction models, the fan behavior is a useful partner clue, but it is the model number and a measurement that tell us what the control is actually reporting. A cooktop with this fan can show the fan symptom without the code, so the pairing is what we note.
Assemblies looked at first
The first examination covers the fan and its bearings, the vents and the path of air through the cabinet, and the temperature sensing that tells the fan when to run. Dust, grease and stored items are common culprits, and a fan that cannot move enough air makes the electronics work harder. A blocked path can also change how long the fan keeps running.
Safe checks from the outside
- Look at the cabinet below for items pressed against a vent or the underside of the cooktop.
- Listen for a rattle or rub that changes with fan speed, and note when it began.
- Check that the kitchen’s range hood is on during long cooking, to reduce rising heat.
When it becomes a technician job
Fan and sensor work happens under the glass beside live electronics, so we leave it to a technician. The visit checks the fan under load, the airflow and the sensing together, so a noisy fan is replaced only if it is the problem and not a symptom of something else.
A detail worth knowing
Greasy kitchens clog fans more quickly. If you fry often, tell us, since a cleaned airflow path can bring the fan back to normal.
A fan that runs on after you finish cooking is not automatically a fault, since many designs cool the electronics for several minutes. It becomes interesting when it runs for a very long time, gets louder, or arrives together with a code. A code that appears only after long cooking suggests heat, while one that appears at power-on suggests something else. Timing it once with a phone stopwatch is helpful.
Frequently asked questions
Often yes, for a few minutes. Very long running or a new roaring sound is worth reporting.
Yes, outside vents and grilles with a soft brush attachment, with the cooktop off. Do not open panels.
A quiet fan with E20 still needs checking, since the code may relate to something else.
Model compatibility: Bertazzoni reuses codes across series and model years, so E20 may mean something different on another appliance or generation. Confirm this against your model’s documentation and record your full model number before acting.
