[FIXED] LG Range keeps heating beyond the temp set for the oven - to over 500 degrees

[gjgogol]

Model Number: LRE30453SB
Brand: LG
Age: More than 10 years

I set my range to 425 to preheat, and ended up overheating, followed by an F9 error code. I googled it and it looks like it could need a relay control board. I am not sure how to zero in and be sure of what part needs to be replaced. Any idea how to test the temp sensor and the relay control board?

[Doc Ryan]

That sounds to me like the relay board is bad and sticking on causing it to overheat. I would unplug the range to be on the safe side until you get it fixed. Let me know what you find.

Relay Board Assembly - 6871W1N012B (PD00001852)

[gjgogol]

That sounds to me like the relay board is bad and sticking on causing it to overheat. I would unplug the range to be on the safe side until you get it fixed. Let me know what you find.

Relay Board Assembly - 6871W1N012B (PD00001852)

Hi...I did end up replacing the relay board and the range temp seems to be controlled for the time being. I still would like to know how to test the old relay board to determine and confirm which relay is bad. I would also like to test the new relay board to see how a good board test looks like.

[Doc Ryan]

I am glad you got it fixed! There isn't a way to test the relays like you are wanting to do that I know of.