JKP15WOA2WW start button not working - GE JKP15 Electric Single Oven

Given the start button is the most used, it is the one that most often fails first. The key panel is one unit, but sometimes you can clean to fix button by removing panel to access and depending on button, some are simply pressure sensitive, so look for sticky button and make sure it operates the same as others. Otherwise, you will have ot replace whole panel.
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Try pushing the "convection oven" or "bake" button first, then enter the temperature you want. Then "Start".

Same thing happened to our Kenmore range and I found a solution on the web about fixing this problem on a fridgedaire range. It was to hold down the clock button for an extended time ~15 sec. It worked for our kenmore and hopefully for yours too.

Fix the probelm, don't replace it with another of the same problem. Try this, it's gonna work! First of all, turn off the circuit breaker. Don't replace anything. The insulation in the ribbon cable is poor. The conductors in the cable are crossed. The ribbon cable is actually two ribbons pressed together, and the conductors between the two cables are shorting or becomming crossed. Lift the two cables apart, place a piece of paper between them, fold the edges of the paper over the cable so that it does not slip out, and make sure to shove it all the way down to where it will meet the plastic display panel housing. Turn the breaker back on. There, problem solved.

probably your button is dirty had carbon inside. do you hear a click sound when press it? if so , the IC did not received the signal, it need to be check by a technician.

my kenmore model number 911-47699100 oven doesn't work. Everything except the oven and broil works--cleaning, all timers, start button, etc. All that happens when you push start is about every 30 seconds, two relays can be heard making and breaking kind of like a click then immediately a clack. No error codes appear. Replaced sensor but that didn't work. Any help would be appreciated.

hold down the clock button for 3-5 secs. youve somehow toggled the clock dosplay off.

This happened to me on Christmas Day morning & it happened once before. I finally remembered how I fixed it. Push the "Clear" button & then push the "Start" & keep it held in until you see the lock button light up (takes awhile) & then push the "Clear" button again. After I did this the "Clock" worked again - reset the clock to the correct time & push "Start" Then click on "Bake" set your temperature & push "Start". Hope this works for you. It got me out of cooking Christmas Dinner, but I fixed it today!!

Our Whirlpool oven just started doing the same thing!!!! The Delay Start Time (setting it for one minute ahead) and then Start works just fine.  But we fried the tops of three loaves of homemade bread!!!!
Is Whirlpool just a bad brand for ovens?