Describe when it occurs
Say whether clicking continues after the control is released and whether one or all burners are affected. Include a spill or cleaning immediately before the change.
Book suitable assessment
Do not dismantle ignition or gas parts. If gas is suspected to be escaping, stop using the appliance and follow the appropriate gas emergency procedure. Routine work remains subject to appliance and task confirmation.
A useful distinction
A burner failing to light and ignition continuing after lighting are distinct complaints. Describe them separately without attempting gas adjustments or assuming the clicking alone identifies a failed ignition module.