- Boilers
- Gas boiler
F07
Ferroli F07 on a gas boiler: flue gas temperature too high
Risk level
High
Professional inspection is recommended.
Urgency
High
Quick answer
Ferroli F07 means the flue gas sensor reads an excessive temperature. It is a temporary lockout that clears by itself; if it keeps happening, call an authorised technician, because three F07 in 24 hours become lockout A14.
Safety first
Stop and check this first
- If you smell gas, do not reset: do not touch switches or light flames, open windows, close the gas valve if it is within reach, leave and call your distributor's emergency number from outside. Ferroli says to disconnect the boiler when it fails and have it repaired only by an authorised technician.
- A high flue temperature affects how combustion gases are removed. If you notice a fumes smell, headache or dizziness at home, switch the boiler off, ventilate, leave and get help; do not use it again until a technician has checked it.
Safe checks you can perform
- Flue gas smell and flue outlet from outside
- Whether F07 clears by itself
- Exchanger and flue sensor check
Leave these tasks to a qualified professional
- Do not attempt this professional task: Flue sensor measurement
- Do not attempt this professional task: Combustion analysis with flue temperature
- Do not attempt this professional task: Heat exchanger inspection and cleaning
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.
Flue sensor measurement
What they doThe technician measures the flue sensor and its wiring against Ferroli's specification.
They must show youthe measured value against the specification.
In writingthe part number of any replaced sensor and why.
Combustion analysis with flue temperature
What they doThe technician measures flue temperature, CO2 or O2 and CO with an analyser and compares them with Ferroli's data.
They must show youthe analyser printout.
In writingthe flue temperature measured and the conclusion.
Heat exchanger inspection and cleaning
What they doThe technician inspects the heat exchanger and cleans it if dirty.
They must show youthe exchanger before and after.
In writingthe cleaning done and its date.
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.
Flue gas smell and flue outlet from outside
- Who:
- you.
- How:
- notice whether there is a smell of burnt gases at home and look at the flue terminal from the ground, without touching it.
- Result that matters:
- whether there is a smell or the terminal is damaged or covered.
- If it smells of fumes:
- switch the boiler off, ventilate and call the technician; do not reset.
- If there is no smell and the terminal is clear:
- carry on.
- Evidence to keep:
- a photo of the terminal and a note of any smell.
Evidence: Ferroli BLUEHELIX TECH RRT 28 C instrucciones de uso instalación y mantenimiento
Whether F07 clears by itself
- Who:
- you.
- How:
- F faults are temporary lockouts that Ferroli clears automatically when the value returns to normal. Wait and watch the display.
- Result that matters:
- whether F07 disappears and the boiler runs again.
- If it clears and does not return:
- note the date and mention it at the service.
- If it keeps returning or A14 appears:
- Ferroli says the flue safety device has acted; call an authorised technician.
- Evidence to keep:
- photos of the display with F07 or A14 and the times.
Evidence: Ferroli BLUEHELIX TECH RRT 28 C instrucciones de uso instalación y mantenimiento
Exchanger and flue sensor check
- Who:
- authorised technician.
- How:
- checks and cleans the heat exchanger if needed and checks the flue sensor.
- Result that matters:
- whether the exchanger or the sensor explains the reading.
- If the exchanger is dirty or blocked:
- that confirms the cause.
- If it is clean:
- it points to the flue sensor or its wiring.
- Evidence to keep:
- a report of what was checked and the values measured.
Ferroli reserves repairs and component replacement for authorised technicians: opening the boiler is not the user's job.
Evidence: Ferroli BLUEHELIX TECH RRT 28 C instrucciones de uso instalación y mantenimiento
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
- Ferroli
- Product type
- Gas boiler
Known code variants
- Bluehelix F07
- Error F07 Ferroli
- F 07
- Ferroli F 07
What it means
On the BlueHelix Tech RRT, F07 (with its variants F14 and A07) is high flue gas temperature: the flue sensor detects an excessive temperature. Ferroli says to check the heat exchanger and the flue sensor. If F07 occurs three times in the last 24 hours, the boiler shows A14, the flue outlet safety device has acted. The code does not tell a dirty exchanger from a sensor that reads wrong.
Warnings and stop conditions
- Criticaleditorial warning
If you smell gas, do not reset: do not touch switches or light flames, open windows, close the gas valve if it is within reach, leave and call your distributor's emergency number from outside. Ferroli says to disconnect the boiler when it fails and have it repaired only by an authorised technician.
Evidence: Ferroli BLUEHELIX TECH RRT 28 C instrucciones de uso instalación y mantenimiento
- Higheditorial warning
A high flue temperature affects how combustion gases are removed. If you notice a fumes smell, headache or dizziness at home, switch the boiler off, ventilate, leave and get help; do not use it again until a technician has checked it.
Evidence: Ferroli BLUEHELIX TECH RRT 28 C instrucciones de uso instalación y mantenimiento
Symptoms and causes
Probable causes · in order
- Exchanger not passing heat onPossible
Ferroli puts the heat exchanger first. If flue gases leave too hot, heat is not passing properly into the water.
Evidence: Ferroli BLUEHELIX TECH RRT 28 C instrucciones de uso instalación y mantenimiento
- Flue sensor reading wrongPossible
Ferroli says to check the flue sensor. It is the explanation if the exchanger is fine and the real flue temperature is normal.
Evidence: Ferroli BLUEHELIX TECH RRT 28 C instrucciones de uso instalación y mantenimiento
Virtual technician
Does F07 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
Ferroli BLUEHELIX TECH RRT 28 C instrucciones de uso instalación y mantenimiento
Ferroli · 2018 · manual
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