- Boilers
- Gas boiler
E.04.10
Baxi E.04.10 on a gas boiler: no ignition after 4 attempts
Risk level
High
Professional inspection is recommended.
Urgency
High
Quick answer
Baxi E.04.10 means the Neodens Lite burner did not light after 4 attempts. Baxi points to the gas supply, the gas valve, the electrodes, the fan or a blocked flue outlet. Reset once and, if it returns, call a technician.
Safety first
Stop and check this first
- If you smell gas, do not reset: do not light flames or use switches, shut off the gas, open windows, leave the home and call your gas distributor's emergency number and a qualified professional from outside, as Baxi instructs.
- If you smell combustion fumes, Baxi says to switch the boiler off, open windows, leave and call a professional. Headache, dizziness or nausea can mean carbon monoxide. Baxi recommends smoke and CO alarms in the home.
- If E.04.10 returns after a reset, do not repeat it: Baxi says that if faults appear frequently, a qualified technician must be called.
Safe checks you can perform
- Smell of gas or fumes near the boiler
- Gas tap and other gas appliances
- Flue terminal seen from outside
- Single reset with the RESET key
- Gas, valve, electrodes and fan by the technician
Leave these tasks to a qualified professional
- Do not attempt this professional task: Electrode, fan and flue outlet check
- Do not attempt this professional task: Gas supply pressure measurement
- Do not attempt this professional task: Gas valve 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.
Electrode, fan and flue outlet check
What they doThey check the electrode connections and condition, fan operation and that the flue outlet has no blockage.
They must show youthe condition of the electrodes and duct, with a photo.
In writingwhat was cleaned, adjusted or replaced.
Gas supply pressure measurement
What they doThe technician measures the gas pressure at the boiler inlet, at rest and during the ignition attempt.
They must show youthe gauge reading.
In writingthe pressure measured against the manufacturer's specification.
Gas valve check
What they doThey check the valve electrical connection, its calibration and that it opens at ignition; if they replace it, they carry out a tightness test.
They must show youthe connection checked and the test result.
In writingthe adjustment made or the part number of the replaced valve.
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 fumes near the boiler
- Who:
- you.
- How:
- go near without turning on lights or using switches and notice whether there is a smell of gas or combustion fumes.
- Result that matters:
- whether there is a smell or not.
- If you smell gas:
- do not reset and follow the gas warning on this page.
- If there is no smell:
- move on to the gas tap.
- Evidence to keep:
- the time and what you noticed.
Evidence: Baxi Neodens Lite 24 AF, 24/24 F y 28/28 F, manual de usuario, instalación y mantenimiento 7892434
Gas tap and other gas appliances
- Who:
- you.
- How:
- check whether the boiler gas tap is open and whether the hob or other gas appliances work.
- Result that matters:
- whether gas is reaching the boiler.
- If the tap was closed:
- open it before the reset.
- If no gas appliance works:
- contact your gas distributor; the boiler is not the cause.
- Evidence to keep:
- tap position and which appliances work.
Evidence: Baxi Neodens Lite 24 AF, 24/24 F y 28/28 F, manual de usuario, instalación y mantenimiento 7892434
Flue terminal seen from outside
- Who:
- you.
- How:
- from the street, the yard or the ground, without climbing onto roofs or touching pipes, look at whether the flue terminal is covered by ice, nests, plastic or objects.
- Result that matters:
- whether there is a visible blockage.
- If it is covered:
- do not use the boiler and call the technician.
- If it looks clear:
- move on to the single reset.
- Evidence to keep:
- photo of the terminal.
Evidence: Baxi Neodens Lite 24 AF, 24/24 F y 28/28 F, manual de usuario, instalación y mantenimiento 7892434
Single reset with the RESET key
- Who:
- you.
- How:
- with no smell of gas, press the manual reset (RESET) key for 1 second, as Baxi says for E faults. Once only.
- Result that matters:
- whether the burner lights and E.04.10 does not return.
- If it lights:
- note the date; if it happens again another day, call the technician.
- If it returns at once:
- do not insist and call the technician.
- Evidence to keep:
- photo of the display and the result.
Evidence: Baxi Neodens Lite 24 AF, 24/24 F y 28/28 F, manual de usuario, instalación y mantenimiento 7892434
Gas, valve, electrodes and fan by the technician
- Who:
- qualified gas technician.
- How:
- measures the gas supply pressure, checks the valve connection, calibration and operation, the electrodes, the fan and the flue outlet.
- Result that matters:
- which of the Baxi cause groups is present.
- If the incoming gas is at fault:
- it is fixed in the installation or by the distributor.
- If a part is at fault:
- it is repaired or replaced and combustion is checked.
- Evidence to keep:
- measured pressure and parts replaced.
Baxi says to disconnect the power and close the gas tap before working on the boiler. Valve, electrodes and fan are technician work.
Evidence: Baxi Neodens Lite 24 AF, 24/24 F y 28/28 F, manual de usuario, instalación y mantenimiento 7892434
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
- Baxi
- Product type
- Gas boiler
Known code variants
- Baxi E.04.10
- E 04 10
- E.04 .10
- E04.10
- E0410
- Neodens Lite E.04.10
What it means
On the Baxi Neodens Lite, E.04.10 is a permanent fault: the burner did not light after 4 attempts. Baxi groups the causes as gas supply (supply pressure, electrical connection, calibration and operation of the gas valve), electrode problem (connections and condition) and other causes (fan operation and blockages in the flue gas outlet). E faults stop the boiler and need a reset with the RESET key for 1 second; if they keep happening, a qualified technician must be called.
Warnings and stop conditions
- Criticalsource verified
If you smell gas, do not reset: do not light flames or use switches, shut off the gas, open windows, leave the home and call your gas distributor's emergency number and a qualified professional from outside, as Baxi instructs.
Evidence: Baxi Neodens Lite 24 AF, 24/24 F y 28/28 F, manual de usuario, instalación y mantenimiento 7892434
- Criticalsource verified
If you smell combustion fumes, Baxi says to switch the boiler off, open windows, leave and call a professional. Headache, dizziness or nausea can mean carbon monoxide. Baxi recommends smoke and CO alarms in the home.
Evidence: Baxi Neodens Lite 24 AF, 24/24 F y 28/28 F, manual de usuario, instalación y mantenimiento 7892434
- Highsource verified
If E.04.10 returns after a reset, do not repeat it: Baxi says that if faults appear frequently, a qualified technician must be called.
Evidence: Baxi Neodens Lite 24 AF, 24/24 F y 28/28 F, manual de usuario, instalación y mantenimiento 7892434
Symptoms and causes
Probable causes · in order
- No gas or low supply pressureCommon
It is the first group in the Baxi table. It fits if the gas tap was closed, there was a supply cut or other gas appliances also fail.
Evidence: Baxi Neodens Lite 24 AF, 24/24 F y 28/28 F, manual de usuario, instalación y mantenimiento 7892434
- Gas valve: connection, calibration or faultPossible
Baxi says to check the gas valve electrical connection, its calibration and its operation. The technician checks it with the boiler open.
Evidence: Baxi Neodens Lite 24 AF, 24/24 F y 28/28 F, manual de usuario, instalación y mantenimiento 7892434
- Electrodes dirty, damaged or badly connectedPossible
Without a spark or flame detection, ignition fails. Baxi says to check the electrical connections and condition of the electrodes.
Evidence: Baxi Neodens Lite 24 AF, 24/24 F y 28/28 F, manual de usuario, instalación y mantenimiento 7892434
- Fan or blocked flue outletLess common
Baxi lists fan operation and blockages in the flue gas outlet. It fits after frost, nests or a covered terminal on a wall or roof.
Evidence: Baxi Neodens Lite 24 AF, 24/24 F y 28/28 F, manual de usuario, instalación y mantenimiento 7892434
Virtual technician
Does E.04.10 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
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