Baxi fault code E.04.10 means the burner failed to ignite after four attempts. Baxi lists this exact description for applicable Combi 2 and System 2 boilers.
The boiler has made its controlled ignition attempts without achieving the required result, so it has stopped and may lock out. The four attempts are part of the boiler’s own safety sequence; they are not an instruction for you to keep pressing reset.
What does Baxi E.04.10 mean?
A boiler has to complete a safe ignition sequence before it can produce heat. E.04.10 records that the burner did not ignite after the boiler made four attempts.
The lockout helps prevent the appliance from continuing an unsuccessful start sequence. The display tells you what happened, but not why it happened or which part, if any, needs replacing.
Which Baxi boilers use E.04.10?
Baxi includes E.04.10 in its current Combi & System 2 error-code group. The listed ranges are the Baxi 200, 400, 600 and 800 Combi 2, the Baxi Assure 500 Combi 2, and the Baxi 600, 800 and Assure 500 System 2.
Codes can differ across ranges and generations. Confirm the complete model name from the outside of the boiler or its paperwork and use the matching Baxi user guide.
Why might a boiler fail to ignite?
An ignition failure can have more than one cause. A known interruption to the property’s gas supply, an ignition-sequence problem or another safety condition may all be relevant. Only proper tests can distinguish between them.
E.04.10 does not automatically prove a fault with the burner, gas valve, electrode, control board or any other single component. Avoid ordering parts or trying online internal fixes based on the code alone.
What do “four attempts” mean?
The number refers to the boiler’s programmed attempts to light during its own operating sequence. It does not mean you should perform four resets or repeatedly turn the power off and on.
Once E.04.10 is displayed, record it and follow the user guide for the exact model. Repeated manual restarts can make the same problem recur without repairing it.
How is E.04.10 different from E.04.12?
Baxi describes E.04.10 as the burner failing to ignite after four attempts. E.04.12 is ignition failure – flame monitoring.
Both relate to ignition, but they are separate fault descriptions. Reporting the full code helps the engineer use the correct Baxi service information and fault history.
What can you safely check?
You can collect useful information without opening the appliance:
- Write down E.04.10 exactly as displayed.
- Confirm the full boiler model from its exterior or paperwork.
- Note whether heating, hot water or both have stopped.
- Record the visible pressure reading.
- Check whether your gas supplier has reported a local interruption.
- If you use a prepayment meter, confirm it has credit.
- Note any unusual sounds, smells or alarms.
- Record what the boiler was doing before the code appeared.
Do not remove the casing, inspect or clean the burner, adjust the gas valve, touch ignition components, test wiring or enter installer menus. Those tasks involve gas, combustion or electrical safety and belong with a Gas Safe registered engineer.
Can you reset Baxi E.04.10?
Consult the user guide for your exact Baxi model. If the guide permits a homeowner reset, one careful attempt may be reasonable when there is no smell of gas, carbon-monoxide alarm, visible damage, leak or unusual noise.
If E.04.10 remains or returns, stop resetting and arrange a repair. Baxi’s general guidance treats recurring lockouts as a sign that the appliance needs professional attention.
When is urgent action needed?
If you smell gas, suspect carbon monoxide or hear a carbon-monoxide alarm, follow current Gas Safe Register emergency guidance immediately. Do not operate electrical switches, use a naked flame or wait for a normal repair booking.
Keep away from the boiler and seek urgent advice if you see smoke, scorching or visible damage. Do not remove the cover to investigate.
Can you keep using heating or hot water?
Do not try to force the boiler to operate while E.04.10 is displayed. It has already stopped after its controlled ignition attempts were unsuccessful.
If one model-approved reset clears the display but the code later returns, the fault is still recurring. Arrange repair rather than relying on repeated restarts.
What will an engineer do?
A Gas Safe registered engineer will confirm the model, review the stored fault information and follow Baxi’s service procedure. They can test the ignition sequence and relevant safety controls, identify the real cause and complete the appropriate repair.
Tell the engineer the exact code, model, visible pressure, whether heating or hot water stopped and whether any supply interruption is known. Our boiler help guides cover other display messages, while all internal ignition checks remain professional work.
Is your Baxi showing E.04.10?
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Quick answers about Baxi E.04.10
What does E.04.10 mean on a Baxi boiler?
It means the burner failed to ignite after four attempts made by the boiler’s control sequence.
Should I press reset four times?
No. The four attempts are automatic boiler attempts, not homeowner instructions. Follow the exact model guide and do not repeatedly reset the appliance.
Does E.04.10 mean the burner must be replaced?
No. The code reports an unsuccessful ignition sequence and does not prove that one component has failed.
Can a gas-supply interruption cause this code?
A known supply interruption can be relevant, but do not test or adjust gas equipment yourself. If no interruption is known or the code returns, arrange professional repair.
Who should repair Baxi E.04.10?
A Gas Safe registered engineer should investigate and repair a gas-boiler ignition fault.