LG Range LRE30453ST Oven will only heat to 325*-No Error Code-Broiler Element seems to still work

[starcitymbh]

Model Number

LRE30453ST/01

Brand

LG

Age

More than 10 years

LG Electric Oven is not heating to the set temperature and seems to stop at 325*. Convection feature does seem to heat to a higher setting but takes 30 minutes to preheat. Main Board was just replaced a year ago. I am not getting any error codes and the broiler element seems to still work fine. Does this point to the temperature sensor being bad? Any videos to show how this can be done? I will not pay the money to replace the main board but instead buy new range.

 

[Jake]

Yes, I'd first disconnect power to the range and remove the oven sensor and ohm test it.

Normal for the oven sensor would be 1050 to 1100 ohms at room temperature.

Here's the oven sensor for your model(Video included in part link to remove and replace it):
EBG61305805 Thermistor, Ptc


Watch this video to ohm test it:

 

[starcitymbh]

Question... other similar posts indicated that the the oven relay board would need replacing. How would you know if it's the Sensor or Relay that's bad? Would that be a seperate relay board than the main board that I just replaced?
Thanks!

 

[Jake]

The oven sensor is separate from the relay board.

Rick explains how to test the relay board here:

FIXED - LG Electric Range LSB5682SW does not keep heat

Hi guys, been looking at a few similar threads to try and diagnose the problem. If I set the bake temperature to 375, it takes forever to get to temp. If and when it does, it doesn’t keep the temperature for long. The broil element works fine and is how we have been heating everything lately...

www.applianceblog.com

You model uses that exact same relay board.