- Boilers
- Gas boiler
A06
Beretta A06 on a gas boiler: hot water NTC sensor fault
Risk level
Low
Usually safe to check without specialist tools.
Urgency
Low
Quick answer
Beretta A06 is a fault in the domestic hot water NTC sensor. The boiler keeps working, but hot water stays near 50 °C without proper control. No reset is needed: tell the technical service.
Safety first
Stop and check this first
- With A06 hot water can come out around 50 °C without control: run cold water first and watch children and older people to avoid scalds.
- 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.
Safe checks you can perform
- Hot water temperature
- Heating working
- Sensor check by the technician
Leave these tasks to a qualified professional
- Do not attempt this professional task: Hot water NTC sensor reading
- Do not attempt this professional task: Connector and wiring check
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.
Hot water NTC sensor reading
What they doThe technician measures the sensor with a multimeter and compares the value with the real water temperature using the maker's table.
They must show youthe measured value against the expected one.
In writingthe reading and any part replaced.
Connector and wiring check
What they doThe technician checks the sensor connector and the cable to the board.
They must show youthe connector checked.
In writingthe repair done.
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.
Hot water temperature
- Who:
- you.
- How:
- carefully open a hot tap and see whether water comes out hot but does not change when you move the hot water knob.
- Result that matters:
- whether water comes out warm or hot at a fixed level.
- If it is hot and ignores the knob:
- it matches what Beretta describes for A06.
- If no hot water comes at all:
- tell the technician; something else may be wrong.
- Evidence to keep:
- a note of what you see and the time.
Evidence: Beretta Ciao Green 25 y 29 C.S.I., manual de instalación y uso
Heating working
- Who:
- you.
- How:
- check whether the radiators heat normally.
- Result that matters:
- whether heating works.
- If it heats:
- that is expected with A06; you can wait for the technician without resetting.
- If heating does not work either:
- note any code shown and tell the technician.
- Evidence to keep:
- a note of what works and what does not.
Evidence: Beretta Ciao Green 25 y 29 C.S.I., manual de instalación y uso
Sensor check by the technician
- Who:
- technician from the technical service.
- How:
- checks the hot water NTC sensor, its connector and the cable to the board.
- Result that matters:
- whether the sensor or its connection fails.
- If the sensor does not respond:
- it is replaced.
- If it responds:
- connector and wiring are checked.
- Evidence to keep:
- a report with the reading and any part 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-06
- A6
- Anomalía A06 Ferroli
- Beretta A 06
- Ciao Green A06
- Cointra A 06
- Error A06 Beretta
- Error A06 Cointra
- Error A06 Ferroli
- Ferroli A06 caldera
- Superlative A06
What it means
In the Ciao Green C.S.I. table, A06 is the hot water NTC sensor fault, a signal type alarm. Beretta explains the boiler works normally but does not manage hot water temperature stability, which stays set near 50 °C, and asks for the technical service. The NTC sensor measures hot water temperature; the code does not separate a faulty sensor from a fault in its connector or wiring.
Warnings and stop conditions
- Mediumeditorial warning
With A06 hot water can come out around 50 °C without control: run cold water first and watch children and older people to avoid scalds.
Evidence: Beretta Ciao Green 25 y 29 C.S.I., manual de instalación y uso
- 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
Symptoms and causes
Probable causes · in order
- Hot water NTC sensor faultyPossible
If the technician measures the sensor and it does not respond to temperature as it should, the sensor is the cause.
Evidence: Beretta Ciao Green 25 y 29 C.S.I., manual de instalación y uso
- Sensor connector or wiringPossible
If the sensor is fine but the board cannot read it, the fault is in the connector or cable.
Evidence: Beretta Ciao Green 25 y 29 C.S.I., manual de instalación y uso
Virtual technician
Does A06 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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