First step is to turn gas off to cook top and also disconnect power to the unit. Than using a crescent wrench disconnect the gas line going to the unit from the Regulator. Than again using the crescent wrench disconnect the regulator from the bottom of the unit. Next remove the nipple that connects the gas line to the regulator from the old unit. Apply new pipe dope to the threads and screw it into the new one and tighten down. Next install the regulator to the unit and install the gas line to the regulator. once done with the install you can now plug the unit in and turn on the gas. You are now ready to use the cook top again
Do not buy just the burner electrodes. The screws that hold the electrode will break off. Purchase the burner head with electrode. I would recommend placing anti-sieze lub on the new screw that holds the electrode to the burner head so if the electrode fails again it can be replaced. The screws that hold the burner head to the top top are mild steel and will rust and snap off. I would use a rust penatrent on these screws several days before trying to remove but most likely they will strip or break off. Replace all these burner head screws with stainless steel screws with anti-seize applied. If any of this sound difficult call a repair company.
A crack in the porcelain caused the spark to not go in the proper direction, therefore the burner would not ignite. To have the job done by a professional would have cost $200.00 plus parts. Remove two phillips screws lift the burner out then remove the one phillips screw that held the electrode. Then with the new electrode in place reverse the previous steps.
Installed new igniter, but would still not light flame. Determined it was a design flaw. On our range, the 2 right hand burners have "lift-off tops" that are farther away vertically from the igniter than the smaller left hand burners. I placed asmall nut from a nut-bolt assembly on top of the igniter, and now the igniter sparks higher to the "lift-off top" and the flame ignites everytime. Without that added heigt, the igniter just sparks uselessly around the base of the burner. There should be a higher igniter designed for the higher distance between the igniter and that removable top. Good luck with your own modification.
Screws holding burner base and ignitor were plain steel. If they had been stainless they probably would not have rusted in so tight. One in the base broke off, and the one holding the ignitor could not be removed, even with heat from a torch. I ended drilling it out and re-tapping the hole. If I wasn't mechanically inclined I would have had to give up and order a new burner base.
Electrode ceramic was chipped. Spark was not coming to the top of the electrode, and stove would not light. Remove two burner screws. These are "baked" on...so use some liquid wrench first if you have it. Don't strip the head, or you'll have a mess. Remove burner, unplug electrode, remove electrode screw, replace electrode. Reverse process and you're good to go!