Worcester Bosch Low Voltage Harness 8716117690

The Worcester Bosch low voltage harness is a replacement wiring loom used inside Greenstar ErP Compact boilers. It carries low voltage signals between the control electronics and the components they drive, so a damaged or corroded loom can interrupt communication across the appliance. This is a manufacturer-supplied spare intended for direct swap-out during repair or servicing work.

• Intermittent faults or random lockouts that clear on their own, pointing to a broken signal path rather than a failed component
• Error codes relating to sensors, fans or control communication that persist after the sensor or component itself has been tested
• Visible damage to the loom: chafed or cracked insulation, scorched sleeving, or exposed conductor
• Loose, corroded or heat-damaged plug terminals that no longer seat firmly on their mating connector
• Continuity faults found while testing the harness with a multimeter during diagnosis

• Check the appliance GC number and model plate against the compatibility list to confirm the harness suits your boiler variant
• Note the alternative part number 1030973, which may appear on older documentation or labelling
• This part is fitted to a gas appliance; installation must be carried out by a Gas Safe registered engineer.