Viking oven temperature problem

[COLOR=#333333][FONT=Trebuchet MS][SIZE=3]I have a Viking VDSC305-4BSS dual fuel oven and I can’t get the temperature of the oven to go passed 200* F. It doesn’t matter what you set it to it always stays around this temperature. You can turn the broil on and it will come on and then go out when the oven temperature reaches about 200. All the elements seem to come on and work then go out once 200*F is reached. [/SIZE][/FONT][/COLOR]

[COLOR=#333333][FONT=Trebuchet MS][SIZE=3]After further troubleshooting I found out the following. I turned the broiler on and when it went off at 200F I turned the oven function knob to bake and turned the oven temperature knob to 500F and the oven light came on. As I turned the knob below 500F the oven light went off. The oven thinks it at 500F when it’s only at 200F. I opened the oven door and track the temperature with my thermometer and the control knob as it went down and documented the results.[/SIZE][/FONT][/COLOR]
[COLOR=#333333][FONT=Trebuchet MS][SIZE=3]
At 200F the oven thinks it’s at 500F[/SIZE][/FONT][/COLOR]
[COLOR=#333333][FONT=Trebuchet MS][SIZE=3]188F 400F[/SIZE][/FONT][/COLOR]
[COLOR=#333333][FONT=Trebuchet MS][SIZE=3]167F 350F[/SIZE][/FONT][/COLOR]
[COLOR=#333333][FONT=Trebuchet MS][SIZE=3]140F 300F[/SIZE][/FONT][/COLOR]
[COLOR=#333333][FONT=Trebuchet MS][SIZE=3]120F 250F [/SIZE][/FONT][/COLOR]
[COLOR=#333333][FONT=Trebuchet MS][SIZE=3]100F 200F[/SIZE][/FONT][/COLOR]
[COLOR=#333333][FONT=Trebuchet MS][SIZE=3]* Measured by my Acurite Thermometer[/SIZE][/FONT][/COLOR]

[COLOR=#333333][FONT=Trebuchet MS][SIZE=3]I also found out that when I put the oven in bake mode it actually never did go completely out. The lower and upper elements gave off a little heat to maintain a temperature of about 123*F. Can anyone tell me what part is defective and where it would be located in the oven?[/SIZE][/FONT][/COLOR]

Bob, did you ever get that temp problem fixed. If so , could you pass on any info. Thanks for your time.