LG WSEP4723 wall oven oven temperature is too hot, too cool or uneven

The checks in more detail

Hang or stand an oven thermometer on the center rack, set the oven to 350 degrees Fahrenheit in the plain Bake mode and wait at least 20 minutes after the preheat signal so the walls and the air have settled, then read it through the glass. Avoid opening the door, since each opening drops the temperature. A reading within about 15 degrees is normal because the elements cycle on and off. If the oven is steadily off by more than that, LG ovens allow you to adjust the temperature in a settings menu, with an offset of plus or minus a few degrees, which you set once and the oven applies to every bake. Check the other causes too.

Make sure that the oven is not in a Convection mode when the recipe assumes a standard bake, and that the rack position matches the recipe. Check the door seal for gaps and the door for a drop that lets heat escape. A dirty oven with heavy spills can smoke and read oddly. If the offset does not hold, or the oven swings by many degrees, the temperature sensor or the control may be at fault, and an LG technician can test the sensor's resistance. Quote WSEP4723F and the serial number, and describe your thermometer test. A few features of this oven are worth knowing before you adjust the offset.

ProBake Convection circulates air with a fan and an element behind it, and the fan makes the temperature more even but shortens cooking times, so a recipe written for a conventional oven may brown early. The preheat chime is a signal that the cavity air has reached the setting, not that the walls are hot, so wait longer for baking. Racks near the top and bottom see more direct heat, so use the center rack for even baking. If you find the oven consistently 15 degrees off after the test, the offset is the right tool, and you should write the change in the manual.