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Old 10-01-2012, 02:36 PM
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Default GE Wall Oven - Fan turns off pre-maturely
Model Number: JTP35SM1SS   Brand: GE   Age: 1 - 5 years   

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I have a GE wall oven that prematurely shuts off the fan (for both ovens) after I have turned off the oven.

The model number is JTP35SM1SS.

That is, I can cook something in the upper oven at 350 or 400 degrees and the oven seems to work fine and the fan runs normally, then when I turn off the oven the fan keeps running for a period of time (maybe 5 or 10 minutes) and then it shuts off. After the fan shuts off the control panel above the upper oven gets very hot to touch over the next several minutes (after perhaps 15 minutes) as the heat escapes from the oven.

My understanding is that the fan should keep running as long as the temperature s above some level in order to keep the internal components cool. In fact, when running the oven, the control panel is either cool or warm to the touch.

The lower oven exhibits a similar behavior The fan runs while the oven is on, and then when I turn it off, the fan immediately turns off. The panel above the lower oven (in between the ovens) then gets hot as the heat escapes upward.

I assume the problem is the thermal switches in the oven that seem to control the fan operation. At least that is what I deduced from the diagrams and text in a service pamphlet that was taped to the inside of the oven. I have an extra control panel and the oven exhibits the same behavior with both panels.

I tested the thermal switches for continuity based on a video I found, and they do have continuity at room temperature. When the upper control panel gets hot (after running the oven), the switches for the upper oven read 1.2 to 1.5 ohms and thus also have continuity. If I remember correctly, I received the same reading at room temperature but I did not write it down.

Is it that the thermal switches that are bad? If so, could there be another problem that has resulted in the switches going bad?

The control panel is not showing any codes when I check it per the service pamphlet that was inside the top of the oven.

Another thing that has confused me is that one of the thermal switches in the top of the oven is not where the parts diagrams nor the service pamphlet indicate it should be. It is installed behind the upper fan (in a separate compartment (separated from the front of the control panel area by a piece of sheet metal) instead of in front of the fan as shown in the diagram and described in the pamphlet. Would this make a difference?

The part numbers for the thermal switches are:WB24T10060 and WB24T10118 (for the upper oven) and WB24T10127 (for the lower oven).

Thanks!


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