My Electrolux Eog6330xn oven cuts out after about an hour and the ignighter then constantly sparks. the oven then has to be turned off to cool down before it will relight. Any advice.

Hello there Gary and welcome to FIXYA

Usually when an oven won't bake properly or stops baking , it's because the bake igniter is weak or burned out. The igniter is a small, round or rectangular device, that's about 1 inch by 4 to 8 inches. It's near the burner itself. The burner is the tube-type device the gas flows through before it's ignited. It has many small holes on the sides to let the gas, when ignited, form a long, low flame. If the igniter is weak, if it glows red but doesn't get hot enough, or if it's burned out, the gas doesn't flow to the burner and the burner won't ignite. If this is the problem, you may need to replace either the igniter or the gas safety valve. Usually the igniter is to blame. I would disconnect the power to the oven then unplug the wiring assy and remove the part then clean all of the terminals really good then reassemble it then try the oven again if it still does not work properly i would go ahead and replace that part ok
Please keep me posted on how this is going i can give you more help but this is the most common problem ok?
Best regards Mike