I have a thermador GPS364GDS gas cooktop, and the left 2 burners stopped working. no spark or gas when valves turned on. The right 2 burners and middle griddle work fine. An appliance repair guy who checked it out said it needed 2 "spark switches". I purchased part #AP3842359 from appliance parts pros, and have installed them, yet still not working. (spark switchs are only located on right 2 burner vavles?) Any suggestions as to what the problem is? All 4 burner ignitors spark when the right valves are turned on, yet nothing when left valves turned on. Any assistance would be appreciated.
-Andy