[VLCab4]

My Kenmore oven will work properly up to about 350 degrees, much higher and it has problems reaching and staying at the correct temp. If I set it to 375 or 400 it may eventually reach 400 but then it drops down to 375 and won't go any higher until I set it at least 50 to 75 degrees higher than the temp I want it to be at. But even if I set it to 500 it won't get any higher than 425. I have had someone come look at it. She replaced the temperature probe, but now seem stumped as to what else to do, even after contacting the Fridgedaire people. Does anyone have a suggestion as to what to try now?