Worcester Bosch 87186841510 Greenstar Main Harness – the critical wiring assembly that connects your boiler's control board to essential heating components. This OEM part ensures reliable signal transmission between the main PCB and burner ignition, pump, and fan systems. Designed for Greenstar condensing boilers, it maintains factory-standard electrical integrity and safety compliance. Direct replacement for worn or damaged harnesses restores full system functionality and prevents intermittent faults or lockouts. Stock this genuine component for rapid repairs and customer confidence.
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