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FIXED LG Range LRG3081ST Oven Temperature Erratic

DandW

Premium Member
Joined
Apr 27, 2021
Messages
5
Location
Ontario Canada
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

Appliance Tech - Admin
Staff member
Joined
Aug 24, 2004
Messages
122,555
Location
McMullen Valley, Arizona
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)
Oven Igniter Test DMM.jpg

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


Jake
 

DandW

Premium Member
Joined
Apr 27, 2021
Messages
5
Location
Ontario Canada
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...
 
Last edited:

Jake

Appliance Tech - Admin
Staff member
Joined
Aug 24, 2004
Messages
122,555
Location
McMullen Valley, Arizona
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

Premium Member
Joined
Apr 27, 2021
Messages
5
Location
Ontario Canada
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

Appliance Tech - Admin
Staff member
Joined
Aug 24, 2004
Messages
122,555
Location
McMullen Valley, Arizona
Your not reading the diagram I posted properly, I will enlarge it.

Oven Igniter Test DMM.jpg
 

evergladesdrew

Premium Member
Joined
Sep 26, 2021
Messages
3
Location
Riverside CA
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

Premium Member
Joined
Apr 27, 2021
Messages
5
Location
Ontario Canada
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.
 

Jake

Appliance Tech - Admin
Staff member
Joined
Aug 24, 2004
Messages
122,555
Location
McMullen Valley, Arizona
Thanks @DandW for coming back to let us know the new igniter fixed yours.(y)

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
 

Jake

Appliance Tech - Admin
Staff member
Joined
Aug 24, 2004
Messages
122,555
Location
McMullen Valley, Arizona
Ok, then I'd order it, if you want to verify it first do what I mentioned above per the amps test.:)

Jake
 
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