Incorrect oven temperature

[SIZE=3]Oven temperature does not reach the set temperature. Set to 400 degrees or above and oven shuts off when temperature reaches approximately 350 degrees; although the display indicates it has reached the set temperature (will beep and shut off). [/SIZE]

[SIZE=3]Replaced week Igniter and still have the same problem. All other features on the appliance work fine. [/SIZE]

[SIZE=3]Is the problem most likely:[/SIZE]
[SIZE=3]1) Control Panel,[/SIZE]
[SIZE=3]2) Harness/Control, or [/SIZE]
[SIZE=3]3) Harness Control Panel[/SIZE]

[SIZE=3]Thanks[/SIZE]

Earl,
Thank you for your reply. I asked my local appliance repairman if he checked the ohms at room temperature and never did get an answer from him. He suggested I buy a new stove/oven. I don’t cook much so the stove/oven are like new. I called Maytag (now Whorlpool) and they told me that they would need to send out a certified Maytag repairman and have the problem diagnosed. $75 visit fee + $60/hr + parts. It doesn’t make sense to send this one to the bone pile but since I gave the first repairman $155 and I’m no better off; I just don’t know what to do.
Carrie