Ariston Flame Loss During Operation

Ariston gas water heater ignites but shuts off after a few seconds; hot water stops quickly.

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.

Possible Causes

Weak flame signal due to dirty ionization electrode, Unstable gas pressure, Blocked burner or partially blocked flue, Faulty flame detection circuit on PCB

How to Fix / Troubleshooting

Safety first: Turn off gas and power. Combustion components should be serviced by qualified personnel.

Clean ionization electrode: Remove and gently clean the flame sensor rod with fine abrasive pad. Reinstall in correct position.
Clean burner and check flue: Remove debris from burner ports and ensure flue is unobstructed.
Check gas supply: Ensure gas valves are fully open and other gas appliances operate normally.

If the problem persists, a technician should measure flame current and inspect the control board.

Repair Difficulty

Hard 4/5

Required Part

Flame Sensor (Ionization Electrode)

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