Worcester Bosch Ignition Transformer 8716117684

The Worcester Bosch 8716117684 is an ignition transformer used in the ignition circuit of Worcester Bosch gas boilers. It raises the low-voltage supply from the appliance control board to the high voltage required to strike a spark at the ignition electrode, so the burner can light on demand. The part is listed by Worcester Bosch under the transformer category and is used across the Greenstar ErP Compact family of combi, system and regular boilers.

• The boiler attempts to fire but there is no spark at the ignition electrode.
• Repeated lockouts on start-up, particularly after the appliance has been standing.
• A weak, intermittent or irregular spark where ignition is unreliable rather than absent.
• Clicking or ticking from the ignition circuit without the burner lighting.
• Ignition faults that persist after the electrode, lead and its connections have been checked.

• Check the appliance GC number and model against the compatibility list before ordering, as the same boiler range can use more than one ignition component.
• Confirm the part number on the existing transformer matches 8716117684 or the alternative number 1030891.
• Inspect the ignition electrode and lead while the appliance is open; a damaged electrode or lead can produce the same symptoms as a failed transformer.
• This part is fitted to a gas appliance; installation must be carried out by a Gas Safe registered engineer.