Spark And Flame Sensing Electrodes; Spark And Flame Sensing Leads - gledhill GB35C Design, Installation And Servicing Instructions

cHANGING PArTS
9.0
9.2 SPArK & FLAME SENSING ELEcTrODES
For access refer to section 9.1 General.
Remove the spark plug style connector from the electrode (and push fit spade
connector from the earth lead in the case of the spark electrode). Remove the two
retaining screws with a Torx T0 driver, carefully withdraw the electrode from the
combustion chamber.

9.3 SPArK AND FLAME SENSING LEADS

For access refer to section 9.1 General.
Remove the clear plastic cover from the inside of the electrical/lower fascia panel by
removing the 4 retaining screws using a pozi type screwdriver. Disconnect the spark
electrode lead by removing the spark plug type connector off the electrode and pulling
off the spade connector from the spark generator in the PCB. In the case of the earth
lead simply pull off the push fit spade connectors from the spark electrode and the
PCB. Disconnect the flame sensing electrode lead by removing the spark plug type
connector off the electrode and removing the stocho crimp connector from the 6
way plug after releasing the side clip and removing the plug from the PCB. Pull out
completely the whole three wire harness having first removed the  screws using a
pozi type screw driver and the protective metal plate where the harness passes from
the boiler compartment to the hydraulic mono block compartment.
Spark and cable
flame sensing
harness
Flame sensing
lead connector
NOTE: To remove the stocko crimp connector from the plug push down using an
electrical screwdriver in the slot provided to release spring and allow removal of the
stocko crimp and the lead.
NOTE: The spark lead, flame sensing lead and earth lead are supplied as a single harness
and should always be replaced completely if any single item needs replacing.
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