Worcester Bosch Burner Assembly RDB-2.2 25/32kW Regular 87186903350

The burner assembly is the component that mixes fuel and air and delivers a controlled flame into the combustion chamber of a Worcester Bosch Greenstar Danesmoor oil boiler. This unit is built to the Riello RDB-2.2 pattern and is rated for the 25/32kW regular output band. It sits at the heart of the combustion process, so its condition directly affects ignition reliability, flame stability and overall boiler efficiency.

• The burner repeatedly locks out and needs manual resetting before it will fire.
• Ignition is delayed, weak or accompanied by a heavy rumbling or puffing noise on start-up.
• The flame is unstable, uneven or visibly the wrong colour, pointing to poor combustion.
• Soot deposits build up quickly on the burner head, blast tube or combustion chamber.
• The boiler runs inefficiently or cuts out shortly after firing despite a clean oil supply and filter.

• Confirm the boiler model and output band against the compatibility list, as the RDB-2.2 assembly is matched to the 25/32kW regular range.
• Check the existing burner for the part number 87186903350 or the alternative number 2247003 before ordering.
• Inspect the burner gasket, seal and nozzle at the same time, as these are commonly renewed alongside a burner assembly.
• This part is fitted to a gas appliance; installation must be carried out by a Gas Safe registered engineer.