- Boilers
- Gas boiler
A03
Beretta A03 on a gas boiler: fan speed alarm
Risk level
High
Professional inspection is recommended.
Urgency
High
Quick answer
Beretta A03 is the fan speed alarm: the board is not getting the flue fan's speed signal properly. Check from outside that the flue terminal is not blocked, reset once and, if it returns, call the technical service.
Safety first
Stop and check this first
- If you smell gas: Beretta says not to touch electrical switches, the phone or anything that sparks, to ventilate by opening doors and windows and to close the main gas tap. Then leave the home and call your gas distributor's emergency number from the street.
- Beretta warns that a badly closed flue pipe can leak carbon monoxide, which is dangerous for people and animals. If you smell combustion, switch off with the selector, ventilate and do not switch on again until the technical service has checked it.
Safe checks you can perform
- Smell of gas or combustion
- Flue terminal seen from outside
- One reset with the selector
- Fan check by the technician
Leave these tasks to a qualified professional
- Do not attempt this professional task: Fan test
- Do not attempt this professional task: Flue and air pipe check
- Do not attempt this professional task: Combustion analysis after the repair
What a technician must be able to justify
Technician visit
These are the steps they must carry out and show you. Tick them as they work: if steps are skipped, do not accept a part swap.
These are not instructions for opening or handling the equipment yourself. They are the checks that should support a technical conclusion.
Fan test
What they doThe technician checks the fan turns without rubbing and the board receives its signal.
They must show youthe fan running and the alarm cleared after the test.
In writingthe fan's condition and whether it was replaced.
Flue and air pipe check
What they doThe technician checks the pipes are the certified ones, properly joined and clear.
They must show youthe sections checked.
In writingthe pipe condition and what was corrected.
Combustion analysis after the repair
What they doThe technician measures the flue gases at the test point with an analyser and compares them with the maker's table.
They must show youthe analyser printout.
In writingthe measured values against Beretta's.
Before accepting a part or repair
Nothing has been shown yet. Do not accept a part swap based on the code alone.
Follow these steps
Note: Follow the documented order. An error code identifies the affected system, but it does not prove by itself which part has failed.
Smell of gas or combustion
- Who:
- you.
- How:
- notice whether there is a smell of gas or burnt gases near the boiler.
- Result that matters:
- whether there is a smell.
- If there is a smell:
- do not reset; follow the gas warning and ventilate.
- If there is no smell:
- carry on with the checks.
- Evidence to keep:
- a note of the time and what you noticed.
Evidence: Beretta Ciao Green 25 y 29 C.S.I., manual de instalación y uso
Flue terminal seen from outside
- Who:
- you.
- How:
- look at the flue terminal from the ground or a window, without touching it or climbing.
- Result that matters:
- whether it is blocked, broken or has objects, nests or ice.
- If you see a blockage or damage:
- tell the technician and do not clear it yourself if it is high up.
- If it is clear:
- it points to the fan or its signal.
- Evidence to keep:
- photos of the terminal.
Evidence: Beretta Ciao Green 25 y 29 C.S.I., manual de instalación y uso
One reset with the selector
- Who:
- you.
- How:
- turn the function selector to off (OFF), wait 5 to 6 seconds and turn it back to summer or winter, as Beretta describes for A03. Do it once.
- Result that matters:
- whether the boiler starts and the code stays away.
- If it starts and does not come back:
- note the date and time; if it repeats another day, tell the technical service.
- If A03 returns or the boiler does not start:
- do not keep trying; Beretta says to call the technical service.
- Evidence to keep:
- a photo of the display with the code and a note of each reset.
Evidence: Beretta Ciao Green 25 y 29 C.S.I., manual de instalación y uso
Fan check by the technician
- Who:
- technician from the technical service.
- How:
- checks the fan, its connection, the board and the flue and air pipes.
- Result that matters:
- where the fault is.
- If the fan does not turn properly:
- it is cleaned or replaced.
- If it turns properly:
- signal, wiring and pipes are checked.
- Evidence to keep:
- a report of what was checked and replaced.
Beretta reserves servicing and maintenance for qualified staff of its technical service: opening the boiler or touching sensors, fan or gas parts is not the user's job.
Evidence: Beretta Ciao Green 25 y 29 C.S.I., manual de instalación y uso
Still not solved
If the error persists, stop here. See what the technician must do and show you.
Where this code applies
A code is meaningful only inside the right product and version context.
Primary scope
- System
- Boilers
- Brand
- Beretta
- Product type
- Gas boiler
Known code variants
- A-03
- Anomalía A03 Ferroli
- Beretta A 03
- calentador Cointra A03
- Ciao Green A03
- Cointra A03
- Cointra water heater A03
- CPE T A03
- Error A03 Beretta
- Error A03 Ferroli
- Ferroli A03
- Ferroli A03 boiler
- Ferroli A03 caldera
- Ferroli error A03
- Supreme E TS A03
What it means
In the Ciao Green C.S.I. table, A03 is the fan speed alarm, a permanent lockout. Beretta explains that a centrifugal fan inside the combustion chamber removes the combustion products and the control board constantly monitors it. A03 means that monitoring has failed. The code does not separate a blocked or faulty fan from a fault in its signal or wiring, or from a problem in the flue or air pipes.
Warnings and stop conditions
- Criticaleditorial warning
If you smell gas: Beretta says not to touch electrical switches, the phone or anything that sparks, to ventilate by opening doors and windows and to close the main gas tap. Then leave the home and call your gas distributor's emergency number from the street.
Evidence: Beretta Ciao Green 25 y 29 C.S.I., manual de instalación y uso
- Higheditorial warning
Beretta warns that a badly closed flue pipe can leak carbon monoxide, which is dangerous for people and animals. If you smell combustion, switch off with the selector, ventilate and do not switch on again until the technical service has checked it.
Evidence: Beretta Ciao Green 25 y 29 C.S.I., manual de instalación y uso
Symptoms and causes
Probable causes · in order
- Fan blocked or faultyPossible
If the technician sees the fan not turning or turning with difficulty, the cause is the fan itself.
Evidence: Beretta Ciao Green 25 y 29 C.S.I., manual de instalación y uso
- Fan signal or wiringPossible
If the fan turns but the board gets no speed signal, the fault is in the signal, the connector or the board.
Evidence: Beretta Ciao Green 25 y 29 C.S.I., manual de instalación y uso
- Flue or air pipesPossible
Beretta requires certified, correctly connected pipes; if they are blocked or badly fitted, the fan runs outside its normal range.
Evidence: Beretta Ciao Green 25 y 29 C.S.I., manual de instalación y uso
Virtual technician
Does A03 still appear after these checks?
Answer a few questions to narrow down the likely cause and the safest next action. Guidance only - it never replaces a professional.
Sources and technical references
- 1
Beretta Ciao Green 25 y 29 C.S.I., manual de instalación y uso
Beretta · 2015 · manual
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