I used a screwdriver to pry the electrode assy. out of the burner. then disconnected the wire. Then just connected the new electrode and place the assy, in the burner.
Disconnected gas & electric connections; lifted unit out of countertop onto padded table upside down. Unscrewed ~16 sheet metal screws for access. Removed bad ignitor by driving off retaining clip. Had to remove burner (3 screws) for access to install retaining clip on new ignitor. Reassembled, reinstalled. Works like new!
