Cooktop burner doesn't switch between small and large
Hello - I have a GE JBP78W oven/cooktop with one burner that can switch between a small or large size functioning burner. I cannot get the burner to operate as a large burner after switching to the large size.
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Re: cooktop burner doesn't switch between small and large
The burners are controlled by switches, that are the one you turn when you turn the knob. Iwf the burner does not switch to high mode than you need to change the switch. The switch for your appliance has part number: WB21X5243 You can by the part from manufacturer clicking here.
Here is an exploded view of your kitchen panel.
The switch is indicated with number 3 in the picture, There should be at least ttwo of them, depending on the model. That is what you need to replace. Its price is $40.50 from GE.
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Yes. Disconnect power to range. Open oven door and remove hex head screws at front edge of cooktop from the bottom side. Lift up front of cooktop. Burner units can then be removed from the underside of the cooktop. Be careful not to damage the gray insulating material around the burner elements if you remove the elements from the cooktop glass.
If you have the glass cooktop slide-in model, the problem is most likely the burner "ribbon' under the glass top for the small burner has come loose. I fixed mine with only a phillips-head screwdriver, needle-nosed pliers, and a 1/4" wrench (1/4" socket on the end of a nutdriver works better). Here are the steps I took to fix it: 1) Slide the oven out from the counter so the sides of the oven are clear of the counter top. 2) Remove the phillips head screws-1 on each side of the oven near the top/rear. These will be the only phillips-head screws you will need to remove. 3) Open the oven door and remove the 4 hex-head screws at the top/front/inside the oven- there are 2 on each side which follow the opening of the door. Then close the door. 4) Pull off the burner knobs by gripping them and pulling straight up. Don't worry, you will not break them but you will need to give them a good tug. 5) Remove the burner retaining nuts that are under the knobs-you may need a wrench to loosen them but only tighten them by hand when reinstalling. 6) Pull the face of the control panel away from the oven slowly until you see a ribbon connector on the right side and then disconnect the ribbon and remove the face plate from the oven. 7) Remove the 4 hex-head screws from the face plate bracket (the plastic part that was holding the face plate) and pull the bracket toward the front of the oven until it flops over and rests on the oven door handle. 8) remove the 2 black screws holding down the glass top-one on each side of the oven-the screw heads face the front of the oven. 9) Disconnect the two wiring harnesses attached to the cook top. Don't worry, they only fit one way so you don't need to label them. 10) Lift the cook top until the wiring harnesses are clear of the holes and place it upside down on a flat surrface. 11) Remove the two retaining bracket screws and brackets from each side of the non-working burner. 12) Slowly lift the burner and flip it upwards until you see the ribbon coils. It should not be necessary to disconnect any wires. 13) Look at the ribbon coils very carefully to see if any of them are disconnected from their main connection points. If so, feed the ribbon back inside the pinch point (you may need a small screwdriver to open the pinch point first) and then use a pair of needle-nosed pliers to pinch the ribbon to hold it in place. I had to use a voltage meter set in the OHM position to find where mine were disconnected. Once you pinch the ribbon end back into place, put everything back together in reverse order. If your burner still does not work, your burner knob switch may be bad. I hope this helps. Good Luck!
Have you run the self-cleaning feature recently? I had a similar problem on my stove of the same model, and it was the switch that detects whether the oven latch is engaged (if it gets stuck and thinks the latch is locked, it will not ignite the main burner or broiler). An easy way to check if that's the problem: without touching the latch, turn the controls to Clean. If the burner lights, that is your trouble.