Ariston Intermittent Ignition / Control Fault

Boiler fan runs but burner does not light, no error code shown

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.

Possible Causes

Weak ignition spark, Marginal gas pressure, Faulty flame sensor, PCB not sending ignition command

Safety: Gas and combustion issues must be handled by a Gas Safe engineer.

Observe pattern: Note whether the boiler eventually locks out with an error code. This helps diagnosis.
Check gas supply: Ensure other gas appliances work normally.
Engineer diagnosis: A professional will check the ignition electrode, flame sensor, gas valve operation, and PCB outputs.

Professional Required 5/5

Ignition Electrode

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