Hi folks, this is my first post. My family has a jenn-air electric oven that is built-in to the island in the middle of our kitchen. We’ve had the oven since the mid-90’s. We’re on the verge of selling our house, so ideally we would like to repair this oven instead of replacing it (which may involve a considerable amount of renovation-work/time/expense). We have our fingers crossed that this problem has a straight-forward fix.
The problem we’ve been experiencing since June 2013 is that the oven will pre-heat properly (although sometimes it is extremely slow), but then once it reaches the agreed-upon heat, it starts going down in temperature despite the digital oven reader displaying the proper degrees (the decrease is verified by an oven-thermometer we placed inside).
The oven-mechanic who came to fix it, felt it was a faulty computer part, so he replaced it, but this hasn’t rectified the problem. The digital-display works fine, but the oven just isn’t heating the way it should!
Thanks in advance for any advice/tips,
~Alex 
Need a complete model number you only gave a partial number should be located near the broiler drawer if you have one and if not if it’s a cooktop its under the unit in the countertop…also gas or electric?
thanks for the response Humboldt!
this is a jenn-air electric oven.
model no: d156
i’m including three photos in case they may help!
thanks again!
I had a similar problem with my Jenn-air slide in range, model JES9860BAW. Replacing the bake element fixed the problem. The old bake element only glowed red in some sections and how a resistance of 18 ohms. The new element has a resistance of 23.6 ohms. I am pretty good with control circuits, but I am unable to explain why this fixed the problem. One might think that the controller sensed that the element was failing (with lower resistance it would have drawn more current) and turned off the bake element to protect the rest of the oven, but I don’t think there is a current sensor on the control board, and why would it turn on the bake element during preheat, but not during the regular bake cycle? There is a high limit switch in the oven which might have been triggered by failing element, but again, why was it not trigger by the preheat cycle?
