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FIXED GE Oven JT912 Testing bad oven element

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Hankf

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Lake Worth, fl
Model Number
JT912
Brand
GE
Age
More than 10 years
My oven on a GE Oven JT912 would not heat up to temperature. I presumed it was a bad element (8 pass) and ordered the part. Installed it and the oven works fine now. I checked the old element... I have continuity across the leads... no shorts from leads to element case...resistance across the leads is 20 ohms. According to what I have read, this element should be fine but did not heat up at all. Any explanation as to why this element is NG???
 

rickgburton

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would not heat up to temperature.
If the element turned on and got warm or red hot, it's good. If the oven heats up but doesn't reach the set temperature the problem is most likely not the element. Check the oven sensor resistance. Should be about 1100 ohms at room temperature.
 

Jake

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Hankf

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Checked temp sensor....1100 ohms. As I said new element works fine but old element won’t and I can’t figure out why.
 

rickgburton

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An element is like a light bulb, it's either good or bad. There's no in between.
 

Jake

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If the old element was not heating and it ohm tested good, then that would puzzle me as well. LOL

It's too early for gremlins, Usually the gremlins come out in the Halloween month of October. LOL

But what Rick and I do is ALSO check for 240 volts across the BAKE ELEMENT when you have the oven set at BAKE 350, if your meter reads 240 volts and the BAKE element is not heating then its bad, whether it ohms good or not.:)

But is extremely rare for the BAKE element to ohm test good, but not heat.

Here's the bake element for your model, in case others need it too:
Bake Element WB44T10055


Jake
 

rickgburton

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I've seen this happen a few times over the years; When the filament inside the element breaks, it doesn't open the circuit until the element starts to cool. They start out as what's called hot spots in the element. Sometimes, when the element reaches room temperature, the metal around it contracted and made a temporary connection on the filament . As soon as the element is energized, the connection opens.
 

Jake

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That makes sense Rick!

Jake
 

Hankf

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I've seen this happen a few times over the years; When the filament inside the element breaks, it doesn't open the circuit until the element starts to cool. They start out as what's called hot spots in the element. Sometimes, when the element reaches room temperature, the metal around it contracted and made a temporary connection on the filament . As soon as the element is energized, the connection opens.
I believe you are right. I think what you meant was that when the element is energized and heats, the circuit is broken. Upon cool continuity is restored and everything tests good.
 

rickgburton

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I think what you meant was
Isn't that exactly what I said?? .........lol


when the element is energized and heats, the circuit is broken.
As soon as the element is energized, the connection opens.

Upon cool continuity is restored and everything tests good.
when the element reaches room temperature, the metal around it contracted and made a temporary connection on the filament
 
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