- Boilers
- Gas boiler
E41
Domusa E41 on an Avanttia NG gas boiler: repeated flame error
Risk level
High
Professional inspection is recommended.
Urgency
High
Quick answer
Domusa E41 is a flame error after 6 ignitions on the Avanttia NG. If there is no smell of gas, check the gas tap is open, disconnect the boiler from the mains, reconnect it and press RESET; if the error persists, call Domusa's SAT.
Safety first
Stop and check this first
- With a flame fault such as E41, a gas smell is an emergency: without smoking or operating anything electrical, open windows and doors, close the main gas valve and get everyone out of the hazard area. Then, per Domusa, notify the gas supplier following the instructions posted beside the meter.
- If you notice a smell of flue gases, Domusa says to switch off the heating, ventilate, close doors to other rooms and leave switches alone. CO is odourless, so with headache, dizziness or nausea get out of the house and call for help; a CO detector at home helps you notice it.
Safe checks you can perform
- Check for a smell of gas or flue gases
- Gas tap open
- Disconnect, reconnect and RESET
- Recent propane tank fill
- Ignition, gas and flue check by the SAT
Leave these tasks to a qualified professional
- Do not attempt this professional task: Burner and ignition cycles
- Do not attempt this professional task: Measure gas flow
- Do not attempt this professional task: Flue and exhaust 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.
Burner and ignition cycles
What they doCleans the burner and combustion chamber without chemicals or steel brushes, then runs several ignition cycles checking every component.
They must show youseveral consecutive ignitions without an error.
In writingwhat was cleaned or replaced and the leak test.
Measure gas flow
What they doChecks that gas flow matches the Avanttia NG data sheet values for the gas the boiler burns.
They must show youthe measured flow against the data sheet.
In writingthe measured value and any correction.
Flue and exhaust check
What they doConfirms the flue is free of obstacles and has no leaks, as listed in the yearly service.
They must show youthe condition of the flue inspected.
In writingthe flue condition and any repair made.
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.
Check for a smell of gas or flue gases
- Who:
- you.
- How:
- without switching on lights or pressing switches, go near the boiler and notice whether there is any smell of gas or of combustion gases.
- Result that matters:
- ruling out a leak before touching anything.
- If there is a gas or fume smell:
- leave the boiler alone and follow the warnings on this page.
- If there is no smell:
- move on to the gas tap.
- Evidence to keep:
- time and what you noticed.
Evidence: Domusa Teknik Avanttia NG operation user guide (CDOC001980)
Gas tap open
- Who:
- you.
- How:
- look at the gas shut-off tap ahead of the boiler and, if you have another gas appliance at home, check whether it works.
- Result that matters:
- knowing whether gas is reaching the boiler.
- If the tap was closed:
- open it and go on to the reconnection.
- If your hob or other gas appliance fails too:
- contact your gas supplier.
- Evidence to keep:
- photo of the tap and of the display with E41.
Evidence: Domusa Teknik Avanttia NG operation user guide (CDOC001980)
Disconnect, reconnect and RESET
- Who:
- you.
- How:
- as the alarm table says, disconnect the boiler from the mains, connect it again and press RESET once.
- Result that matters:
- seeing whether the boiler lights or E41 returns.
- If E41 returns:
- call Domusa's SAT and do not keep repeating the cycle.
- If it lights and heats:
- keep a note of when you restarted it.
- Evidence to keep:
- time of the restart and what followed.
Evidence: Domusa Teknik Avanttia NG operation user guide (CDOC001980)
Recent propane tank fill
- Who:
- you, only if your boiler burns propane.
- How:
- think back to whether the tank was filled or installed shortly before E41 appeared.
- Result that matters:
- linking the fault to a recent fill.
- If it matches:
- Domusa says to contact the person responsible for filling the tank first.
- If you use natural gas or there was no fill:
- skip this step.
- Evidence to keep:
- date of the last tank fill.
Evidence: Domusa Teknik Avanttia NG operation user guide (CDOC001980)
Ignition, gas and flue check by the SAT
- Who:
- Domusa's official service (SAT) engineer.
- How:
- checks gas flow against the data sheet, inspects and cleans the burner, confirms the flue is clear and runs several ignition cycles.
- Result that matters:
- finding why no flame forms.
- If gas is not arriving properly:
- the installation is corrected or the supplier is notified.
- If gas arrives fine:
- burner, ignition and gas valve are examined.
- Evidence to keep:
- report with the measured values and the work done.
Domusa keeps all maintenance for its authorised staff; the burner, the gas valve and mains voltage parts sit inside the boiler.
Evidence: Domusa Teknik Avanttia NG operation user guide (CDOC001980)
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
- Domusa Teknik
- Product type
- Gas boiler
Known code variants
- Avanttia NG E41
- caldera Domusa E41 no enciende
- Domusa boiler E41 will not light
- Domusa E 41
- Domusa error de llama tras 6 encendidos
- Domusa error E41
- Domusa flame error after 6 ignitions
- E 41
- E-41
- Error E41 Domusa
What it means
The alarm code table in the Avanttia NG user guide (CDOC001980) defines E41 as a flame error after 6 ignitions. As the solution, Domusa says to disconnect the boiler from the mains, connect it again and press RESET, and to contact the SAT if the error persists. The guide gives no further causes for this code; the leads come from its gas and maintenance advice. Outside the Avanttia NG the numbering may not match. E41 alone is not enough to declare any specific part faulty.
Warnings and stop conditions
- Criticalsource verified
With a flame fault such as E41, a gas smell is an emergency: without smoking or operating anything electrical, open windows and doors, close the main gas valve and get everyone out of the hazard area. Then, per Domusa, notify the gas supplier following the instructions posted beside the meter.
Evidence: Domusa Teknik Avanttia NG operation user guide (CDOC001980)
- Highsource verified
If you notice a smell of flue gases, Domusa says to switch off the heating, ventilate, close doors to other rooms and leave switches alone. CO is odourless, so with headache, dizziness or nausea get out of the house and call for help; a CO detector at home helps you notice it.
Evidence: Domusa Teknik Avanttia NG operation user guide (CDOC001980)
Symptoms and causes
Probable causes · in order
- No flame across several attemptsCommon
This is what Domusa's table names: the boiler has tried to light six times without achieving a proper flame.
Evidence: Domusa Teknik Avanttia NG operation user guide (CDOC001980)
- Fuel supply cut offPossible
Domusa says the fuel supply is cut off to shut the boiler down completely; if that tap was left closed or the supply fails, the boiler cannot light.
Evidence: Domusa Teknik Avanttia NG operation user guide (CDOC001980)
- Propane tank not properly purgedPossible
For propane boilers, the guide warns of ignition problems if the tank was not suitably purged and says to contact whoever fills it first.
Evidence: Domusa Teknik Avanttia NG operation user guide (CDOC001980)
- Burner, gas flow or fluePossible
Domusa's yearly service covers a clean burner, gas flow at the data sheet values and a flue free of obstacles; only authorised staff check these.
Evidence: Domusa Teknik Avanttia NG operation user guide (CDOC001980)
Virtual technician
Does E41 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
Domusa Teknik Avanttia NG, guía rápida de funcionamiento para el usuario (CDOC001923)
Domusa Teknik · 2020 · manual
- 2
Domusa Teknik Avanttia NG operation user guide (CDOC001980)
Domusa Teknik · 2020 · manual
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