I am having problems with intermittent failure in the Griddle system of a THERMADOR PDR364GDZS. Turn on, no spark or gas. Ambiant temperature related. If room is cool (64-68 Deg F) System fails frequently. Turning on oven for 15 to 20 minutes solves problem. Suspecting thermal variance in control circuitry. I have had several aplliance repairman replace misc componenets throughout the years with no lasting solutions. I am looking for Electric and Electronic Schematics for this appliance to solve this issue once and for all. I have the tools and skills to resolve this issue, I need the schematics of the system and control boards. Given the cost of this stove I can't believe I should have this much trouble finding the schematics, (say nothing of the trouble with the stove to begine with). Any advice would be welcome. Thank you.