GE Oven takes too long to preheat JGB760SEF2

[r208Cobra]

Model Number

JGB760SEF2SS

Brand

GE

Age

1-5 years

Good afternoon,

The oven in our LP GE JGB760SEF2 takes too long to preheat, then, if the door is opened, even for just a few seconds, the temperature showing on the display drops 80 to 100 degrees, then, again, takes too long to rise to the correct temperature. I have not verified the actual temperature with a standalone thermometer. but, there is still a problem regardless.

Would anybody have any ideas on what might be the problem or, what I should test to figure out exactly what the problem is? I did replace the igniter about a year ago, but, that did not change the preheat time. Also, the stove top works beautifully.

Please let me know if more information is needed, I'll be happy to provide it and thank you for your help!

 

[Jake]

I'd first check to see how many amps its pulling when its ON and GLOWING:

JGBS22BEA2WH GE XL 44 Range Burning through oven bake igniters?

Have an old GE XL 44 - JGBS22BEA2WH - that I seem to keep having igniter problems with. I replaced the igniter maybe a couple of years ago (along with the thermostat), found the other day that it wasn't working. Replaced it with the old igniter that I had kept from the last time, and it seems to...

www.applianceblog.com

This is your OEM oven glow bar bake igniter:
WB13K21 Oven Igniter

The control board sends 120 volts to it, then the amps on it send a signal to the oven gas safety valve to open up to let the gas flow out, then that oven glow bar bake igniter ignites the gas to make the flame.

This ignitor should draw 3.3 - 3.6 amps.

You can use a clamp on style amp meter to check the amps on one of the glow bar igniter wires and see if your meter reads between 3.3 - 3.6 amps.

 

[r208Cobra]

I finally had time to dig into this problem and found: the igniter pulls 3.4 amps when glowing. When the igniter is disconnected from the gas valve, it did show resistance. The gas/safety valve has two sets of spade terminals. I disconnected both sets to isolate the valve and both sets measured 0.9 ohms. I put everything back together, set the oven to 350F on the regular bake setting and started my stopwatch. It took 30 minutes to preheat to 350F.

As a side note, when I had the bottom burner cover/oven floor panel out yesterday, I watched the cycle of events out of curiosity. The igniter came on, then about 30 seconds later, the gas lit. The igniter stayed on the entire time until the oven reached the preheat temperature of 225F, then went out. Is that normal?

In any case, what else should I check or do the symptoms clearly indicate where the problem lies?

Thank you for your help!

 

[Jake]

Ok, ohm test the oven sensor. You'll need a multimeter.

Pull your RANGE out from the wall, then unplug it OR turn the breaker off to it, then take the back access panel off and you will see a connector that goes to it, remove the connector and ohm test it. Normal would be 1050-1100 ohms at room temperature.

Here's the oven sensor for your model you can order if yours is bad:
WB20K10027 Temperature Sensor


Watch this video to ohm test it:

 

[r208Cobra]

Good morning. I tested the temperature sensor over the weekend after disconnecting the power to the range and its resistance was 1106 Ohms. I put everything back together, set the oven to preheat at 350deg F and again, it took 30 minutes to get to 350deg F. I set the oven to Hi Broil, its igniter came on and the burner tube had a nice, big blue flame. I thought to look at the oven burner tube on the bottom of the oven after removing the bottom pan and when it lit, there was not a lot of blue flame, but, it was running all along the length of the tube. So, now I'm wondering:

Is the broiler supposed to light and help with the initial preheating when the oven is set to regular (non-convection)? If so, the oven does not do that.

The only things left to check are the control board and the gas/safety valve. Is there any way to check the control board? Is there another test I can run on the gas/safety valve since it passed the initial resistance test?

Thanks for your help!

 

[Jake]

Is the broiler supposed to light and help with the initial preheating when the oven is set to regular (non-convection)?

That I don't know unless I look at the schematics to your machine, which I don't have. Some models do and some don't.

The only things left to check are the control board and the gas/safety valve. Is there any way to check the control board? Is there another test I can run on the gas/safety valve since it passed the initial resistance test?

Same thing without the schematics to your machine I don't know.

You can test the oven safety valve per this video below. Here's the oven safety valve for your model:

https://www.repairclinic.com/PartDetail/Safety-Valve/WB21X21506/3280487