Slipping igniter knob – Ensure that knob is pushed firmly onto igniter. When installed correctly, it is difficult to remove.
Loose electrode wire – Check that electrode wire is firmly pushed onto the terminal on the back of the igniter.
Improper gap at electrode tip – Ensure that the collector box is tight, and the gap between the electrode end and the collector box is between 1/8 – 3/16″. The gap can be adjusted by bending the box in or out.
Lifting flames on burner- Close air shutter slightly – see previous problem.