Worcester Bosch Code Plug LPG 8716121435

This is a Worcester Bosch LPG code plug, an electrical configuration component that tells the appliance's control board which fuel the boiler is set to run on. It is specific to the liquefied petroleum gas variant of the Greenstar 4000 Combi range, sitting within the boiler's wiring and control assembly. Fitting the correct plug ensures the control electronics apply the right combustion parameters for LPG operation.

The code plug is a fixed configuration component rather than a wearing part, so failure usually shows itself through the appliance's behaviour rather than through visible damage. Typical pointers include:

• Fault codes relating to fuel type or combustion setup appearing at the control panel
• The boiler failing to run correctly after the control board has been replaced
• Incorrect or erratic burner behaviour on an LPG-converted or LPG-specified appliance
• A damaged, corroded or loose plug connection at the control board
• Commisioning or servicing checks showing the appliance is not reading the expected fuel configuration

• Confirm your appliance model and GC number against the compatibility list, as this plug is specific to the LPG version of the Greenstar 4000 Combi
• Note the alternative part number 8922966 when checking against existing stock or documentation
• Check the plug connector and its seating at the control board before ordering, as poor contact can mimic a failed plug
• This part is fitted to a gas appliance; installation must be carried out by a Gas Safe registered engineer.