Beretta Delayed Ignition / Hard Light-Off

Boiler ignites with a loud bang or pop (hard ignition).

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

Incorrect gas valve pressure setting, Dirty burner, Misaligned ignition electrode, Low gas supply pressure

Safety: Hard ignition can damage the boiler; stop using it and have it checked.

Do not adjust gas yourself: Gas settings must only be changed by a qualified technician.
Technician – combustion check: Perform flue gas analysis and adjust the Beretta gas valve according to specifications.
Clean burner and electrodes: Remove burner, clean thoroughly, and ensure ignition electrode gap and position are correct.
Check gas supply: Verify inlet gas pressure and that the supply pipe is correctly sized.

Professional Required 5/5

Gas Valve Assembly

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