FIXED LG Range LRG3081ST Oven Temperature Erratic

[DandW]

Model Number

LRG3081ST

Brand

LG

Age

1-5 years

I am having a strange problem with our LRG3081ST oven. If I set the temperature on the oven display to 400 degrees it comes on and the temperature rises fairly steady until it hits 395, then it sits there for some time. I put a new oven thermometer inside to check what was going on. When it reaches 395 on the oven control, it actually goes to 500 degrees before it shuts off. Then the temperature in the oven will drop off to below 200 before it comes back on. Then (sometimes) the glow will be in the bottom for some time before it ignites. If I shut the oven off and restart it to 400 again it shows the temperature in the oven at about 190. Sometimes it will restart and other times it won't, just glows but no ignite.

I replaced the oven temperature sensor figuring that was the problem but, I it is still doing it. Seems real intermittent, my wife used it the other day and it seamed to work okay. Then she went to use it yesterday and it gave the problem again. I just don't want to throw a bunch of money at this replacing part by part until I hit the right one.

Any ideas ?

 

[Jake]

Then (sometimes) the glow will be in the bottom for some time before it ignites.

The problem is the oven igniter itself is likely weak. It should take about 45 seconds and no longer than 60 seconds to light the gas.

What happens is when you turn on either the bake or broil cycle the igniter should draw 3.2-3.6 amps to properly open the oven safety valve for bake or broil.

If you'd like to check it, use an Clamp style Amp Probe around one of the igniter wires. You're looking for 3.2 to 3.6 amps.

OR

Here's a diagram Rick made that shows you how to test for 3.2-3.6 amps for the bake cycle. You can use a multimeter to check for 3.2-3.6 amps when its on the bake cycle and see what reading you get.

(click to enlarge)


Here's the oven igniter for your model:
MEE61841401 Ignitor


Jake

 

[DandW]

Thanks Jake
It seems to start up fine each time. It's after it gets to temperature that the problems start. So, after oven gets hot...

 

[Jake]

Yes, I understand what your saying, but the only way to test it is what I described above, other than that you'd need a LG tech. to come out and see what's going on.

Jake

 

[DandW]

I had a look this morning and the wire has a connector. Can't see how I would leave one wire connected and disconnect the other. Maybe I am missing something ??

 

[Jake]

Your not reading the diagram I posted properly, I will enlarge it.

 

[evergladesdrew]

Hi All,
So my oven's experiencing similar issues. What would be the next step if the ignitor is weak and there's <3.2 amps of current going to it? Replace the ignitor? or Replace the control board?

 

[DandW]

It turned out that my issue was the igniter. Although it looked to be working with the glow, the amps were low and described above. Replaced it and all is now working great again.

 

[evergladesdrew]

Ok got it, so if the amps are low then replace. I also so another video that mentioned that if the resistance across the two wires is lower or higher than 1000 to 1200 ohms then it also needs to be replaced - mine is at 250 Ohms. Awesome, thanks for replying back!

For reference: Oven Not Heating? Igniter Testing – Gas Oven Troubleshooting

 

[DandW]

No problem...hope it corrects your problem. It's not expensive for what it is.

 

[Jake]

Thanks @DandW for coming back to let us know the new igniter fixed yours.

So my oven's experiencing similar issues. What would be the next step if the ignitor is weak and there's <3.2 amps of current going to it? Replace the ignitor?

9 times out of 10 its just a weak ignitor.

Do you have the same model number LRG3081ST?

Jake

 

[evergladesdrew]

Hi Jake, yup I have the same ignitor!

 

[Jake]

Ok, then I'd order it, if you want to verify it first do what I mentioned above per the amps test.

Jake

 

[Kathryn McCool]

I have an LG LRG3081ST gas range with temperature regulation issues; I read the above information. I turned on the oven and it took 70 seconds for the gas to ignite. Prior to that, I set the temperature at 350 and at some point it stopped heating and dropped to 170. Yesterday I set it at 425 and it heated up to over 450, and then, no matter where I set it, it wouldn't heat to over 400. Is it the ignitor or the thermostat or both? Thank you in advance.

 

[Kathryn McCool]

Ok, then I'd order it, if you want to verify it first do what I mentioned above per the amps test.

Jake

Hi Jake, can you help with my question above regarding the temperature irregularities in my oven? I just turned it back on and it took 75 seconds for the gas to ignite.
Thank you,
Kathryn

 

[Jake]

Hi Kathryn,

That indicates your oven ignitor is weak, and it needs to be replaced.

Oven Ignitor MEE61841401


Here's the video to replace it: Oven Igniter Replacement Video

Jake

 

[Kathryn McCool]

Thank you! Due to the unknown age of the oven, I'm replacing both. They're both easily replaced.
Cheers!

Kathryn

 

[Jake]

Sounds good Kathryn, let us know how it goes.

Jake

 

[Kathryn McCool]

Will do!

 

[Kathryn McCool]

I replaced the igniter - easy to do. Set the oven to 375, and the igniter lit up within 20 seconds! I think, GREAT! It heats up to 435 and doesn't stop heating (it's gas). Half the problem solved; Now what?
Thanks!