- Boilers
- Gas boiler
A07
Beretta A07 on a gas boiler: heating flow sensor fault
Risk level
Medium
Proceed carefully and stop if the check is unclear.
Urgency
Medium
Quick answer
Beretta A07 groups faults of the heating flow NTC sensor: sensor failure, overheating or an abnormal difference with the other sensor. Do not open the boiler: note the code and call the technical service, as Beretta asks.
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.
- For A07 Beretta only says to call the technical service: do not remove the cover or touch sensors or connectors; inside there is mains voltage and hot parts.
Safe checks you can perform
- Type of lockout
- Pressure gauge reading
- Sensor check by the technician
Leave these tasks to a qualified professional
- Do not attempt this professional task: Flow and return sensor readings
- Do not attempt this professional task: Circulation 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.
Flow and return sensor readings
What they doThe technician measures both NTC sensors with a multimeter and compares them with the maker's table and the real temperature.
They must show youthe values of both sensors.
In writingwhich sensor failed or why it was ruled out.
Circulation check
What they doThe technician checks pressure, venting and water circulation in the primary circuit.
They must show youthe pressure and the running test.
In writingwhat was corrected.
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.
Type of lockout
- Who:
- you.
- How:
- take a photo of the code and note whether the boiler restarts by itself after a while or stays locked.
- Result that matters:
- whether it is a temporary stop or a lockout that stays.
- If it restarts by itself:
- it fits an NTC fault or temporary overheating; tell the technician.
- If it stays locked:
- it fits the permanent part of the table; call the technical service.
- Evidence to keep:
- photos of the code with date and time.
Evidence: Beretta Ciao Green 25 y 29 C.S.I., manual de instalación y uso
Pressure gauge reading
- Who:
- you.
- How:
- with the boiler cold, read the gauge. Beretta asks that pressure stays at or above 1 bar.
- Result that matters:
- whether pressure is around 1 to 1.5 bar.
- If it is below 1 bar:
- top up with the filling tap to 1 to 1.5 bar with the selector on OFF, as Beretta describes, and tell the technician.
- If it is correct:
- lack of water does not explain A07; carry on with the other checks.
- Evidence to keep:
- a photo of the gauge with the date.
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:
- measures the flow and return NTC sensors and compares their readings with the real temperature.
- Result that matters:
- which of the three causes of A07 applies.
- If a sensor reads wrong:
- it is replaced or its connection repaired.
- If they read correctly:
- check why the water overheats or the difference is large.
- Evidence to keep:
- a report with the readings and what was 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 07
- A7
- Beretta A 07
- Ciao Green A07
- Cointra A 07
- Error A07 Beretta
- Error A07 Cointra
- Superlative Supra A07
- Supra A07
What it means
In the Ciao Green C.S.I. table, A07 covers three situations of the heating flow sensor: NTC fault (temporary stop), sensor overheating (temporary, then permanent) and a differential alarm between flow and return sensors (permanent lockout). For A07 Beretta only says to call the technical service. The code does not say which of the three happened; the technician tells them apart by measuring the sensor and comparing temperatures.
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
- Mediumeditorial warning
For A07 Beretta only says to call the technical service: do not remove the cover or touch sensors or connectors; inside there is mains voltage and hot parts.
Evidence: Beretta Ciao Green 25 y 29 C.S.I., manual de instalación y uso
Symptoms and causes
Probable causes · in order
- Heating flow NTC sensor faultyPossible
If the technician measures the sensor outside its table, the cause is the sensor or its connection, without the water really being hot.
Evidence: Beretta Ciao Green 25 y 29 C.S.I., manual de instalación y uso
- Overheating on the flowPossible
If the sensor reads correctly but the water exceeds the limit, the problem is heating or circulation, not the sensor.
Evidence: Beretta Ciao Green 25 y 29 C.S.I., manual de instalación y uso
- Abnormal flow and return differencePossible
If both sensors read correctly but with an unusual difference, Beretta flags it as a differential alarm with permanent lockout.
Evidence: Beretta Ciao Green 25 y 29 C.S.I., manual de instalación y uso
Virtual technician
Does A07 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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