First of all the display hasn’t worked for 2 years now. It seems like the oven will get up the the desired temp (ding once) then goes down to approx half the desired temp (guessing). I have already replaced the oven sensor any other suggestion? I really need to get the parts ordered and installed before Thanksgiving.
Hi.
What is the real temperature in the oven? Use the oven thermostat to check it.
Please provide the complete model number.
Simon.
Complete model number is SVD48600W
Sorry thought the "W" stood for white, will get the actual temp tonight and repost
The temperature of the oven seems to get up about 190 degrees is all.
I tested the element, with the ohm meter on 200 I get a reading of 20.1 ohms, I also tested it for shorts and found none.
Any additional suggestions?
Hi.
First make sure there is 240VAC to the oven.If it is then
check for 240VAC at the bake or broil elements when the oven turned on to the bake or broil. If there is no proper voltage check the hi - limit thermostat at the rear of the oven. it should have continuity. If it’s open - replace it
IF the hi -limit is OK then most likely there is a bad relay board but for normal and safe use of this oven you need to have the clock replaced.
The relay board 12001691
The control board 71001799
Here are the breakdown diagr4ams and http://www.appliancepartspros.com/body-parts-for-jenn-air-svd48600w.html
Post the results.
Simon.
Thanks for the quick reply Simon, I will try and get through this tonight, I will post my results 
I tried following your directions however I could not locate hi-limit relay see enclosed picture of the back.
I did verify 240VAC at the outlet and at the range.
I also tested the volts at the bake element 120VAC same as the broiler element, however I really hate to admit but as soon as I got the 120V I didn’t try again, I should have waited a few minutes to see if the voltage dropped off, but I didn’t, by the way the broiler works as expected.
Before I make the purchase of the relay board, is there anything else I should check?
Thank you again for you guidence
Hi.
If the broil works fine then it’s not the hi limit.
I’m not sure that you are measuring the voltage correctly.
To check the voltage - turn the oven to bake, set the meter to VAC, touch the element’s contacts with each meter’s probe. The correct reading should be 240VAC, if you are getting 120VAC then the relay board is bad.
Check the broil element’s voltage when the oven is set to broil. You should have 240VAC there.
Simon.