Set Appliance State:

Isolate Mains Power to appliance as per TOPs P4

Observation:

Check that the burner is fitted correctly:
1. Burner should not angle downwards on the right hand side.
2. Burner needs to be fitted into the burner tab on the rear, this can be hard to see visually, if in doubt remove burner then refit burner / combustion cover correctly and recheck combustion readings.