LG oven overheating
Model Number: LRG3.85ST Brand:
1 - 5 years
I have a 3 year old LRG3085ST gas range/oven with a heating problem. I set the oven to bake at 350° and it shows preheating on the display with the temp progressing upwards. The display stalls at 345° but the burner continues and the actual oven temp gets to over 450°. Then the ready chime sounds, the display says 350° but the oven is now over 450° and the display still says 350°. If I let the oven cool to 350° actual oven temp, the oven now will maintain 350°.
If I try to preheat from cold to any temp below 300° it functions normally. Also, I can preheat to 275° and after the chime sounds hit Bake 350° or anything higher and the oven temp levels off and functions properly but no chime. VERY STRANGE. I have replaced the main oven PCB, relay board and the thermistor probe. I can make the oven serviceable by doing my two step preheat but shouldn't have to. Also, there is no power to the convection motor at any temp. Any ideas?