• Please note, some of the links on our site are affiliate links (Learn More)

LG Range LRG3081ST Oven Temperature is not Consistent

ben.scarbalis

Premium Member
Joined
Oct 10, 2021
Messages
10
Location
Wauconda
Model Number
LRG3081ST
Brand
LG
Age
1-5 years
I have an LG LRG3081ST that was purchased from Home Depot back in 2015. The oven has heating issues where the temperature is off by at least 50 degrees when I bake, and off by over 100 degrees when i use convection mode. I have replaced the EBG61305801 Temperature Sensor, the Range Igniter MEE61841401, the EBR60969206 PCB Assembly, and the EBR73815106 PCB Assembly,Main but the problem has not been fixed. I am ready to start looking for another oven, but thought if maybe anyone else had any ideas to help me with this? Everything I replaced came from reading through forums on this website that have been super helpful!
 

Attachments

  • IMG_20211007_154446322.jpg
    IMG_20211007_154446322.jpg
    184.4 KB · Views: 30
  • IMG_20211007_154449787.jpg
    IMG_20211007_154449787.jpg
    193.4 KB · Views: 30
  • IMG_20211005_093641579.jpg
    IMG_20211005_093641579.jpg
    338.3 KB · Views: 31

rickgburton

Appliance Tech - Moderator
Staff member
Joined
Jul 11, 2006
Messages
44,295
Location
Murray, Utah 84107, United States
The main control board and oven sensor control the temperature. Check the oven sensor for about 1060 Ω at room temperature. Here's the deal. If you don't have a DMM, you need one. Today everyone and their brother is selling appliance parts. That means replacing a part with a new part doesn't mean it's a good part. We've seen many, many problems with appliance parts from eBay and Amazon. We had one member go thru 3 dryer motors before he got one that worked. That's more and more common over the last few years. If the oven sensor checks good replace the control board:
 

ben.scarbalis

Premium Member
Joined
Oct 10, 2021
Messages
10
Location
Wauconda
Thank you Rick for the quick reply!

I am going to head out to Menards (midwest store) and go pick up this one:
menards.com/main/electrical/electrical-tools-accessories/electrical-testers/smart-electrician-reg-digital-multimeter/sdm-720/p-1444431008092-c-6452.htm?tid=-5815898504569078358&ipos=1
 

ben.scarbalis

Premium Member
Joined
Oct 10, 2021
Messages
10
Location
Wauconda
It looks like the temperature sensor is good. I took a picture just to be safe. First time using a DMM
 

Attachments

  • IMG_20211013_193337811.jpg
    IMG_20211013_193337811.jpg
    667.6 KB · Views: 28

ben.scarbalis

Premium Member
Joined
Oct 10, 2021
Messages
10
Location
Wauconda
Thats weird, i have already replaced the PCB Main Assembly, is there any way I can test this with the DMM to see if it is working properly? Thank you for your help, if you were my neighbor id already have a six pack at your door.
 

rickgburton

Appliance Tech - Moderator
Staff member
Joined
Jul 11, 2006
Messages
44,295
Location
Murray, Utah 84107, United States
already replaced the PCB Main Assembly,

replacing a part with a new part doesn't mean it's a good part.
seen many, many problems with appliance parts from eBay and Amazon.

is there any way I can test this with the DMM to see if it is working properly?
The control uses the information from the oven sensor to open and close the relays which energizes the elements. What would you like to test?

Are you using that grocery store temperature gauges as the only source to check the oven temperature?
 
Last edited:

ben.scarbalis

Premium Member
Joined
Oct 10, 2021
Messages
10
Location
Wauconda
The control uses the information from the oven sensor to open and close the relays which energizes the elements. What would you like to test?
I have both the PCB assembly EBR60969206 and the PCB Main Assembly EBR73815106 (the one with the clock) sitting on my workbench. I assume I recieved a bad PCB main assembly from Amazon, is there any way i can test it because a previous thread told me that would be the issue. I replaced mine with the one i got and it still is way off. The bake is off by about 50 degrees, the convenction mode is off by over 150 degrees. The fan turns on several seconds on convection mode, then turns off, then turns back on multiple times, i think thats normal though. Trying to give as much information on this as I can. Appreciate your help again!
 

Attachments

  • 51oZByIHKPL._AC_SL1000_.jpg
    51oZByIHKPL._AC_SL1000_.jpg
    35.9 KB · Views: 19
  • 71YD-k2rGmL._AC_SL1500_.jpg
    71YD-k2rGmL._AC_SL1500_.jpg
    131.1 KB · Views: 21

rickgburton

Appliance Tech - Moderator
Staff member
Joined
Jul 11, 2006
Messages
44,295
Location
Murray, Utah 84107, United States
Post a copy of your wiring diagram from your tech sheet. What board does the oven sensor plug into?
 

rickgburton

Appliance Tech - Moderator
Staff member
Joined
Jul 11, 2006
Messages
44,295
Location
Murray, Utah 84107, United States

rickgburton

Appliance Tech - Moderator
Staff member
Joined
Jul 11, 2006
Messages
44,295
Location
Murray, Utah 84107, United States
Are you referring to the individual board components? Service techs won't go past board level because it's not cost effective. It's best to replace it rather than fix it.

You never answered this:
Are you using that grocery store temperature gauges as the only source to check the oven temperature?
Does your meter have a temperature function?
 

ben.scarbalis

Premium Member
Joined
Oct 10, 2021
Messages
10
Location
Wauconda
Are you referring to the individual board components? Service techs won't go past board level because it's not cost effective. It's best to replace it rather than fix it.

You never answered this:

Does your meter have a temperature function?
The board has been replaced with one from Amazon, however the temperature is still way off. This is the temperature sensor i am using:

menards.com/main/appliances/appliance-parts-accessories/cooktop-range-parts/smart-choice-reg-oven-thermometer/l304432836/p-1568183331127-c-1525097549557.htm?tid=7009318537965152479&ipos=2

Unfortunately my DMM does not have a temperature fuction :(
 

rickgburton

Appliance Tech - Moderator
Staff member
Joined
Jul 11, 2006
Messages
44,295
Location
Murray, Utah 84107, United States
The board has been replaced with one from Amazon, however the temperature is still way off.
I believe that's already been established back in post #2 and again in post #7 and again in post #9. Lol I don't think I would replace an expensive board based on the information from a $3 thermostat. Those thermometers aren't very accurate and they don't always work. If you think yours is working ok, it probably is.

When you say the temperature was off by more than 100°, is that 100° higher or lower?? I assumed higher.??
 

ben.scarbalis

Premium Member
Joined
Oct 10, 2021
Messages
10
Location
Wauconda
Upon testing tonight the Convection bake function is off by over 100 degrees, the regular bake function is off by about 50 degrees but i can live with that.
 

rickgburton

Appliance Tech - Moderator
Staff member
Joined
Jul 11, 2006
Messages
44,295
Location
Murray, Utah 84107, United States
The only difference between bake and convection bake ia a fan so the fan turning on makes it another 50° hotter. Sounds like a bad control board.
 
Top