Hobart electric convection oven model #cn90 ser. # 07-007-968-nj

The CN90 is an electric oven.

first out put voltages measures,when output voltages ok , then see the control circuit.after tnat every thing ok. replace heating elements.

you must understand this : your electric oven must be indicate if it is a single phase( use 3 wires for 230 2 hot wires + 1 Neutral see the diagram like dryer? you must sure about this. Normally any appliance for home are single phase NOT 3 phase.

2) If you electric oven, say 3 PHASES( use 4 WIRES, 3 hot wires+1 Neutral wires) this for industrial application +comercial NOT for home

However if you system is 3 phase you must need to install 3phase transformer.

Try parts town.com
You will need the model #

Check the bottom hinges, one of them should have a roll pin, the pin might be broken

No they usually run 2 minutes one way and 2 minutes in opposite direction to even out the baking.
Unless its erratic then something else is wrong.

Jenn-Air is now a division of Whirlpool so you might want to check with their closest service company and ask if there is a wiring diagram pasted inside a panel of the unit. This is common practice on many appliances.

It can be done with a transformer, 480/ 240 single phase transformer to get the lower voltage. Then the oven will require some wiring changes to get all the elements and controls connected to two hot wires instead of three. The transformed will be sized to the wattage rating of the oven. This is a only basic description of what needs to take place.

If you need further help, I’m available over the phone at https://www.6ya.com/expert/craig_3fa289bf857b1a3c

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.

your convection element has blown by one online and replace it yourself