Vulcan convection oven has pilot lit and fan blows but no ignition. The schematic is too small, grease smeared and partly ripped to be of use. Is a schematic available or is the cause obvious to an experienced expert?

The list of problems is as long as the one Obama inherited when he took over. Good news though, the most expensive part works, the blower motor! The pilot is established which rules out a gas issue. The two most common problems are, either the temp controller or the infinate switch is bad. Your unit has one or the other but, not both. Controller has several wires leading to it & has a green or tan circuit board on it, infinate switch is a small black or white 2 inch square box with 4 or 5 wires leading to it. Each one of these are mounted thru the front control panel & both have knobs. Temp board around $180, infinate switch around $45. As far as the schematic is concerned, Vulcan was bought by Hobart & they DO NOT give out schematics or service manuals.