After just few times usage of my LG range LRE30453st, oven paint is peeling off in quite few areas. I have extended warranty but Best Buy and LG are playing ping pong with me. They say it is cosmetic problem. Could you tell me if it can be repaired, is it toxic to use oven in such condition?

Be sure you have 230 volts across the red and black wires at the terminal block the power cord attaches to. I suspect you have only one line to the range.

It is simpler to check a portion of the range first. Go to the relay board for the bake and broil elements. Check for incoming voltage between the red and black wires. You should have 230 volts all the time.

Set the oven control to bake at 350 degrees and check between the yellow and black wires that go to the bake element. You should have 230 volts. If you have 0 volts, check between the yellow wire that goes to the bake element and the black wire that goes to the terminal block of the range. If you have 230 volts here, the DLB relay on the relay board is bad. This will prevent bake and broil from working.

We can go through the relay board for the cooktop. I think it is best to eliminate one problem at a time.