Hi Steve,
You can try cleaning the electrodes with a piece of emery cloth. After that you are probably looking at a new ignition control and the replacement control is probably not a straight change out, wiring-wise. Not an easy task for a DIY project unless you are electrically inclined and can follow a schematic proficiently.
Thanks
Mark
Journeyman Technician
UA Journeyman Pipefitter , HVAC, Refrigeration, DDC controls. 26 years.Commercial & residential