Author Topic: Oven control board keeps burning up  (Read 794 times)

El_Viajero

  • Stubble
  • **
  • Posts: 105
Oven control board keeps burning up
« on: August 15, 2017, 06:11:29 PM »
I've got a 2009 LG electric range, model LRE30757. One of the terminals on the oven relay board (or PCB assembly) burnt up. I replaced the entire board (LG model number EBR32401002). The same terminal burnt up a few days later. It's one of the terminals for the "bake" function of the oven.

It would seem there's too much heat coming from the wire to the terminal. Or is it something else? In any case, I'm wondering if anyone knows what could be causing this and if it's something I can fix on my own.

The image below has an arrow pointing to the terminal that keeps getting burnt up.

http://imgur.com/a/szApT

El_Viajero

  • Stubble
  • **
  • Posts: 105
Re: Oven control board keeps burning up
« Reply #1 on: August 18, 2017, 11:01:49 AM »
UPDATE: I called an appliance repair guy and explained the problem just to see what he thought. He says there's probably a short in the wire somewhere, but he's not sure he'd be able to fix it. He says it's probably not worth his coming over to my house and that I should probably just get a new range.

Any thoughts, folks? Is he right or is he just too lazy to come to my place and look at it?

It seems like a wire could just be replaced...

...if that's all it is.

I don't see any damage to the wire that was connected to the burnt terminal, and I can see the entire wire. It's a bit brown on the ends compared to the others I guess because so much heat has moved through it.

I welcome any suggestions or input!

dycker1978

  • Pencil Stache
  • ****
  • Posts: 718
  • Age: 39
  • Location: Regina, Saskatchewan, Canada
Re: Oven control board keeps burning up
« Reply #2 on: August 18, 2017, 11:15:00 AM »
I used to repair LG stoves in a business setting.  This could be one of two things.  There could be an issue with the wiring.  When in business I would replace the whole wiring harness, and this makes sure you get any potential problem in the wiring.  This is a little bit of a dog of a job.  The less expensive choice would be just to re connect a new wire in place of the one that you feel is causing the issue.

The other thing that I saw, which was way more common, was the component that the wire is attached to had a short, and the failure point was the PCB.  I would take a look at the bake element.  I would see if you can get a new PCB from LG(there should be a 90 day warranty on a new part typically from LG) and also order the bake element. 

El_Viajero

  • Stubble
  • **
  • Posts: 105
Re: Oven control board keeps burning up
« Reply #3 on: August 18, 2017, 02:09:27 PM »
I used to repair LG stoves in a business setting.  This could be one of two things.  There could be an issue with the wiring.  When in business I would replace the whole wiring harness, and this makes sure you get any potential problem in the wiring.  This is a little bit of a dog of a job.  The less expensive choice would be just to re connect a new wire in place of the one that you feel is causing the issue.

The other thing that I saw, which was way more common, was the component that the wire is attached to had a short, and the failure point was the PCB.  I would take a look at the bake element.  I would see if you can get a new PCB from LG(there should be a 90 day warranty on a new part typically from LG) and also order the bake element. 

Thanks! Just so I'm clear, you're saying that there's a good chance the bake element has a short, which results in a failure (burnt terminal) at the PCB. So I should see about replacing the bake element for the model I've got AND asking LG about the warranty on the new (now dead) PCB board I just bought.

Is that right?

dycker1978

  • Pencil Stache
  • ****
  • Posts: 718
  • Age: 39
  • Location: Regina, Saskatchewan, Canada
Re: Oven control board keeps burning up
« Reply #4 on: August 18, 2017, 04:38:04 PM »
I used to repair LG stoves in a business setting.  This could be one of two things.  There could be an issue with the wiring.  When in business I would replace the whole wiring harness, and this makes sure you get any potential problem in the wiring.  This is a little bit of a dog of a job.  The less expensive choice would be just to re connect a new wire in place of the one that you feel is causing the issue.

The other thing that I saw, which was way more common, was the component that the wire is attached to had a short, and the failure point was the PCB.  I would take a look at the bake element.  I would see if you can get a new PCB from LG(there should be a 90 day warranty on a new part typically from LG) and also order the bake element. 

Thanks! Just so I'm clear, you're saying that there's a good chance the bake element has a short, which results in a failure (burnt terminal) at the PCB. So I should see about replacing the bake element for the model I've got AND asking LG about the warranty on the new (now dead) PCB board I just bought.

Is that right?

Yes exactly

El_Viajero

  • Stubble
  • **
  • Posts: 105
Re: Oven control board keeps burning up
« Reply #5 on: August 18, 2017, 11:04:58 PM »
Just ordered the bake element! I'll post the results to this thread.

El_Viajero

  • Stubble
  • **
  • Posts: 105
Re: Oven control board keeps burning up
« Reply #6 on: September 07, 2017, 10:12:25 AM »
...and FAILURE.

The control board burned up again with the new element. I've spent a fair amount of money on this. I don't think it's worth spending any more.

wienerdog

  • Bristles
  • ***
  • Posts: 413
Re: Oven control board keeps burning up
« Reply #7 on: September 11, 2017, 02:59:14 PM »
Can you post a picture of the damage on the control board?