Johnson & Starley Plug and Lead Assembly S00866

The Johnson & Starley S00866 is a plug and lead assembly supplied as a spare wiring harness for Johnson & Starley water heating appliances. It carries the electrical supply between components inside the unit, so the control sequence and ignition circuit can operate as designed. The part sits within the Johnson & Starley Spares range of cables, leads and wiring harnesses and is listed under the manufacturer's original reference 1000-0516670.

• The appliance fails to fire or cuts out intermittently because the lead is not delivering a stable supply.
• The plug connector is loose in its socket, or the terminals show corrosion, heat discolouration or arcing marks.
• Insulation on the lead is cracked, brittle or chafed where it passes through a panel or clip.
• Fault tracing points to an open circuit or intermittent continuity along the harness rather than to the board or valve.
• The connector has been disturbed during earlier work and no longer clips or locks positively into place.

• Check the appliance data plate and GC number against the compatibility list to confirm the model is the Eljan 6 water heater.
• Compare the existing connector shape, pin count and lead length with the S00866 assembly before fitting.
• Note the alternative reference 0516670, which may appear on older labels or documentation.