No heat My problem began with unit not heating when in convection roast bake, but it heated in broil and regular bake and broil. Now the top oven doesn't heat in any mode.

I have attached a link to the service manual, there are relays that control the elements. https://www.manualslib.com/manual/703000/Dcs-Wo-227ss.html?page=42#manual

You're actually referring to the "broiler" elements. Most electric ovens have these at the top of the main oven space. (Some gas ovens are set up the same way, but many put the broiler elements in a bottom drawer.)

As their name implies, broiler elements are active only when you're broiling. They will not go on for baking.

Broiling is the process of cooking food by exposing it directly to a high heat source at close range. To broil a steak, for example, you would place the pan holding the steak on an oven rack raised to the top or next to top position in the oven (consult the manual) and set the oven to broil. The top elements will then turn on and cook the meat by direct radiation.

Most people, however, use ovens for baking far more often than for broiling. Baking is the process of cooking food (cakes, casseroles, roasts etc) by indirect heat. In other words you raise the oven to a certain temperature, put the food on a rack more in the middle of the oven, and let the surrounding heat cook it over time. When you bake the top broiler elements usually don't come on at all.

I hope this helps.

Manufacture and model would be nice ohm out the bake element might be open some are in the oven cavity others are hidden below the lower oven plate and have to check from the rear by removing back cover in the bake mode the broil element element cycles on/off thats why you have some heat.

is this 400c or 400f

it could be the oven temp sensor rod located near the top of the inside of the oven,or possibly the bake element has a hot spot on the element and can no longer pass enough current thru this spot to correctly heat to your settings a hot spot on the element will look discolored in this area

have you inserted the business card as described in the solutions?

I just found out my baking oven doesn't work and I hear the fan for the convection roast, but no heat. I had the appliance man out and he said that I need a relay board! Big bucks and they don't make this model anymore. Moreover, the microwave and warming drawer work fine. This is ridiculous!

With all that you said, I would suspect an open or faulty element. It is pretty much the most obvious solution.

If you have any electronically ability and you are going to open the oven, use an ohm or resistance meter, check the amount of ohms and use the upper element as a reference for the correct reading.
The element will either read open or good. You can use a light tester also and if the light lights between the two connectors of the elements, then it is ok and look elsewhere.

E

I would suggest that you check the oven element, it sounds as though it is faulty to me.

Bake- Normal convection- both upper and lower heating elements.

Conv. Bake- Semi-forced convection- both upper and lower elements, heat is then distributed throughout the oven via the fan.

Broil- radiation- The heat is radiated by the ifrared broil element.

Broil & Fan- Radiation and Ventilation- The radiated heat from the infra-red broiling element is distributed throughout the oven via the fan.