A01
Vokera
Ignition Failure (Modern Alpha Code)
Vokera boiler (e.g. Compact, Easi-Heat, Vision) shows A01, no flame detected
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Safety Warning
This repair may involve working with high voltage components or water connections. Always unplug the appliance before removing any panels.
If you are not confident in your ability to perform this repair safely, we strongly recommend contacting a professional technician.
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Possible Causes
No gas supply to boiler, Faulty ignition electrode, Faulty gas valve, Blocked burner
How to Fix / Troubleshooting
Safety first: Switch off the boiler and isolate gas if you suspect a leak. Only Gas Safe engineers should work on gas components.
- Check gas supply: Confirm other gas appliances work. Ensure the gas cock under the boiler is open.
- Reset once: Press and hold the reset button as per the user guide. Watch for ignition attempts.
- External checks: Ensure the flue terminal is clear and the condensate pipe is not frozen.
- Engineer tasks:
- Inspect and clean ignition electrode and flame sensor.
- Check gas valve operation and inlet pressure.
- Clean burner and check for correct combustion.
If A01 persists after basic checks, contact a Gas Safe engineer.
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Repair Difficulty
Professional Required
5/5
Required Part
Ignition Electrode
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