- Boilers
- Gas boiler
01
Immergas 01 on a gas boiler: ignition failure lockout
Risk level
High
Professional inspection is recommended.
Urgency
High
Quick answer
Immergas 01 means the boiler could not light within the set time and has locked out. Check the gas tap is open, press Reset once and, if the lockout returns, call the authorised technical service.
Safety first
Stop and check this first
- If you smell gas: Immergas says to close the meter or main gas tap and, if you can, the boiler's gas tap, open doors and windows, use no naked flames, do not smoke and do not touch switches, sockets, doorbells or phones. Leave the home and call your gas distributor's emergency number from the street.
- If you get a headache, dizziness or nausea while the boiler runs, there may be carbon monoxide: switch it off, ventilate, leave the home and call the emergency services. A CO alarm near the boiler warns you before symptoms start.
- Do not chain Resets with E01: after 5 in a row the boiler shows E08 and accepts no more Resets for an hour. If the lockout persists, Immergas says to call the Authorised Technical Assistance Centre.
Safe checks you can perform
- Gas tap open
- One Reset
- When the code appears
- Ignition, flame and gas check by the technician
Leave these tasks to a qualified professional
- Do not attempt this professional task: Ignition and detection electrode
- Do not attempt this professional task: Gas failure safety device and gas pressure
- Do not attempt this professional task: Combustion analysis
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.
Ignition and detection electrode
What they doThe technician checks the correct position, condition and cleanliness of the ignition and detection electrode, as Immergas asks in the annual maintenance.
They must show youthe electrode and its position.
In writingwhether it was cleaned or replaced, with the part reference and why.
Gas failure safety device and gas pressure
What they doThe technician checks the gas failure device using ionisation flame control, whose response time must be under 10 seconds according to Immergas, and that gas flow and pressures match the manual.
They must show youthe gas pressure measured against the manufacturer's specification.
In writingthe values measured and the response time checked.
Combustion analysis
What they doUsing the chimney sweep function, the technician measures CO2 at the three reference outputs and CO. Immergas sets a maximum CO below 700 ppm at the annual check and below 500 ppm after a repair.
They must show youthe analyser printout.
In writingthe CO2 and CO values measured against the manufacturer's.
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.
Gas tap open
- Who:
- you.
- How:
- check under the boiler that the gas tap is open and, if you have another gas appliance, whether it works.
- Result that matters:
- whether gas is reaching the boiler.
- If the tap was closed:
- open it and do one Reset (next check).
- If it was open and another gas appliance does not work either:
- the problem is the supply; contact your gas distributor.
- Evidence to keep:
- a note of the tap position and whether other appliances work.
Evidence: Immergas Victrix Zeus 25/32, instrucciones y advertencias para instalador, usuario y mantenimiento (1.042022SPA)
One Reset
- Who:
- you.
- How:
- press the Reset button once, as Immergas states for E01.
- Result that matters:
- whether the boiler lights and the code stays away.
- If it lights and does not return:
- note the date and time; it fits a lockout after inactivity.
- If E01 returns:
- stop; Immergas says to call an authorised company, for example the Authorised Technical Assistance Centre. After 5 Resets in a row the boiler shows E08 and blocks Reset for an hour.
- Evidence to keep:
- a photo of the display with the code and a note of each Reset.
Evidence: Immergas Victrix Zeus 25/32, instrucciones y advertencias para instalador, usuario y mantenimiento (1.042022SPA)
When the code appears
- Who:
- you.
- How:
- note whether E01 appears on first start-up, after days without use, after a gas supply cut or on every demand for heating or hot water.
- Result that matters:
- the pattern.
- If it only appeared after inactivity or a gas cut:
- tell the technician; it fits that reason.
- If it appears on every demand:
- it points to ignition, flame detection or gas, and needs a technician.
- Evidence to keep:
- a note of dates, times and what you were asking the boiler to do.
Evidence: Immergas Victrix Zeus 25/32, instrucciones y advertencias para instalador, usuario y mantenimiento (1.042022SPA)
Ignition, flame and gas check by the technician
- Who:
- technician from an authorised company.
- How:
- checks the ignition and detection electrode, the gas failure safety device and the combustion.
- Result that matters:
- why the boiler does not light within the set time.
- If the electrode is dirty, out of position or damaged:
- it is cleaned, repositioned or replaced.
- If the gas or combustion is out of specification:
- it is corrected before the boiler is used again.
- Evidence to keep:
- a job sheet with what was measured, replaced and why.
Immergas reserves commissioning, maintenance and repairs for professionally qualified staff. Gas, burner, electrode and combustion are not user work.
Evidence: Immergas Victrix Zeus 25/32, instrucciones y advertencias para instalador, usuario y mantenimiento (1.042022SPA)
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
- Immergas
- Product type
- Gas boiler
Known code variants
- E01
- Error 01 Immergas
- Immergas E01
- Victrix 01
- Victrix E01
What it means
In the Victrix Zeus 25/32 table, E01 is the failed ignition lockout: on a demand for heating or hot water, the appliance does not light within the preset time. Immergas adds that on first start-up or after a long period of inactivity a lockout may need clearing with Reset. The code does not say whether gas was missing, ignition failed or the flame was not detected; the ignition and detection electrode, the gas and the combustion are checked by the technician.
Warnings and stop conditions
- Criticaleditorial warning
If you smell gas: Immergas says to close the meter or main gas tap and, if you can, the boiler's gas tap, open doors and windows, use no naked flames, do not smoke and do not touch switches, sockets, doorbells or phones. Leave the home and call your gas distributor's emergency number from the street.
Evidence: Immergas Victrix Zeus 25/32, instrucciones y advertencias para instalador, usuario y mantenimiento (1.042022SPA)
- Criticaleditorial warning
If you get a headache, dizziness or nausea while the boiler runs, there may be carbon monoxide: switch it off, ventilate, leave the home and call the emergency services. A CO alarm near the boiler warns you before symptoms start.
Evidence: Immergas Victrix Zeus 25/32, instrucciones y advertencias para instalador, usuario y mantenimiento (1.042022SPA)
- Highsource verified
Do not chain Resets with E01: after 5 in a row the boiler shows E08 and accepts no more Resets for an hour. If the lockout persists, Immergas says to call the Authorised Technical Assistance Centre.
Evidence: Immergas Victrix Zeus 25/32, instrucciones y advertencias para instalador, usuario y mantenimiento (1.042022SPA)
Symptoms and causes
Probable causes · in order
- First start-up or long inactivityPossible
Immergas warns that on first start-up or after a long time unused a lockout may need clearing. Fits if one Reset solves it and it does not return.
Evidence: Immergas Victrix Zeus 25/32, instrucciones y advertencias para instalador, usuario y mantenimiento (1.042022SPA)
- Gas not reaching the burner properlyPossible
Fits if the gas tap was closed or there was gas work or a supply cut. At commissioning Immergas asks for a check that there is no air in the gas pipe.
Evidence: Immergas Victrix Zeus 25/32, instrucciones y advertencias para instalador, usuario y mantenimiento (1.042022SPA)
- Ignition or flame detection failurePossible
Fits if E01 returns after every Reset with the gas open. Immergas asks for the position, condition and cleanliness of the ignition and detection electrode to be checked at maintenance.
Evidence: Immergas Victrix Zeus 25/32, instrucciones y advertencias para instalador, usuario y mantenimiento (1.042022SPA)
Virtual technician
Does 01 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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