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LG LSE4616BD Induction Range - Induction burners do not work

LGinduction

Premium Member
Joined
Apr 7, 2021
Messages
3
Location
Canada
Model Number
LSE4616BD
Brand
LG
Age
1-5 years
I have an 18 month old LG LSE4616BD induction range and the induction burners have stopped working. The one warming burner which is not induction still heats. The four other induction burners turn on for ten seconds then shut off; they do not heat. I have replaced the main board in the stove top portion PN: EBR82913601 as there looked to be a burnt spot on the board so I figured that was the issue but that didn't solve the problem. All other features of the range appear to function properly except the induction burners. Any idea what the problem is?
 

rickgburton

Appliance Tech - Moderator
Staff member
Joined
Jul 11, 2006
Messages
41,296
Location
Murray, Utah 84107, United States
Apparently it's too new and doesn't come up on any parts sites and I don't have any service info on that model. The induction modules are a PITA to diagnose with a wiring schematic. Without a schematic it can't be done. LG usually puts a thermal fuse and thermostat between the two modules. Check those first.

Somewhere on that machine is an envelope with the tech sheet inside. See if you can find it and post a copy here. If you have a lower drawer look behind it or taped to a side panel.
 

LGinduction

Premium Member
Joined
Apr 7, 2021
Messages
3
Location
Canada
The envelope is there for the wiring schematic but it’s torn apart and no paperwork inside unfortunately.

There is a 20A ceramic fuse on each of the two filter boards. Both of these fuses are blown. I’ll get some new fuses and try that but what would have caused the fuses to blow? Is it common for these fuses to blow on induction cook tops?
 

rickgburton

Appliance Tech - Moderator
Staff member
Joined
Jul 11, 2006
Messages
41,296
Location
Murray, Utah 84107, United States
Good question. It's not common for the fuses to go out. If you replace the fuses you'll just be repairing a symptom and not the problem.
 

LGinduction

Premium Member
Joined
Apr 7, 2021
Messages
3
Location
Canada
Dug into this further and found two out of the four IGBT components on each of the two induction heater boards were bad. The rectifier and other IGBTs tested fine. I'll order some replacement IGBTs and test the stove top then. From what I've been reading it seems to be fairly common for an IGBT to go. Could be due to poor heat dissipation and cooling. They are on a pretty good size heat sink and the fans work though. Here's a link to another thread on this forum with similar issues.


I'll report back once I get the new IGBTs in. Here's a photo of one of the boards I'm working with for reference.

Induction Board Right.jpg
 
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