Set Appliance State:

Isolate Mains Power to appliance as per TOPs P4
Remove Gas Manifold Assembly

Observation:

Inspect the gap between the burner and the flame sense electrode.
The gap should be approximately 6mm.
Note:
1. Before reassembly check the integrity of all disturbed gaskets and seals and replace as necessary.
2. Upon reassembly all disturbed joints should
be checked for gas tightness.