Worcester Bosch Burner Nozzle 12-9 NG 8716117253

The Worcester Bosch 8716117253 is a burner nozzle supplied in 12-9 NG specification. It sits in the gas train of the burner assembly, where it meters and shapes the gas flow into the combustion head so the mixture burns cleanly and at the correct rate.

This is a gas-carrying component used across the Worcester Bosch Greenstar i ErP System range, and it is listed against both natural gas and LPG variants of those appliances.

• Unstable or lifting flame at the burner, or a flame that will not hold steady once the boiler has lit
• Repeated ignition failure or lockout shortly after the burner fires
• Sooting or discolouration around the combustion head and heat exchanger
• Combustion readings drifting outside the expected range on a flue gas analyser
• Rough running, popping or a change in burner noise compared with previous services

• Check the GC number and appliance serial plate before ordering, as the same boiler family is built in both natural gas and LPG versions with different nozzle specifications
• Confirm the part number 8716117253 or the alternative number 1031273 against the old component
• Inspect the burner seals and gaskets while the burner is open and replace any that are hardened or damaged
• This part is fitted to a gas appliance; installation must be carried out by a Gas Safe registered engineer.