Top 20 LG LMV1813ST Microwave Oven - Page 4 Questions & Answers

won't sit peoperly if you dont probably won't cook properly if you don't the revolving plate does that same thing as a fan forced oven

Here is a section of the manual for your microwave on child lock, hope this helps. "L" - Page 7 Press and hold STOP/CLEAR until " L " appears on the display and a BEEP sound is heard. The CHILD LOCK is now set. The time will disappear on the display . To cancel CHILD LOCK press and hold STOP/CLEAR until " L " disappears. You will hear a BEEP when it's released. If any button is pressed, "L" will appear on the display Your oven has a safety feature that prevents accidental running of the oven. Once the child lock is set, you will be unable to use any functions and no cooking can take place. However your child can still open the oven door. Press STOP/CLEAR. Child Lock 7

sounds like its not on high power.. Some microwaves have a popcorn button..This is usually automatically a high setting.Try putting your water in then hit popcorn...If the water heats up faster then your power settings are set wrong. You just need to change them. Your not set on high power..

it sounds like a fuse has blown, they are easy to replace but it should be done by a professional

try unplugging the unit for about 5 min..... for the microwave to reset. Plug back in and try a microwaveable safe bowl with a little water for 30 sec. This may take care of the error message. F4 indicates an open sensor

could be the magnetron is burned out. try this website for parts and solutions it has troubleshooting there.http://www.appliancepartspros.com/repair-help/lg-microwave-lmv2031st-repair

Push clock button and press the Up/down buttons to change time to pm.

Check your user manual. It should describe how to reset this light. These types of service filter indicators are activated after a set amount of time determined by the manufacturer has elapsed. The microwave has not actually detected a dirty filter, it's just a reminder that its time to clean the filter.

Is your glass turntable sitting on the rotator correctly? If it is even slightly misaligned it will make terrible noise.

Check those microswitches.

Check for 110VAC at the primary of the power transformer. If not present check microswitches.

You would have shorted some thing out a fuse may be on a pc board. Check the light socket as well . You could also google make and model for a manual

not installed correctly get in an electrician for the job

Did your microwave give you any error codes?

Check the fuse. Also check out the safety switch by the unit door. If not closed when door is closed, no power is applied to either the turntable or the tube.

Did you have any power surges in the house? Any thunder storms?? even if you are not using a microwave, but it is plugged in , you see the clock?? That means it is getting power and running the clock so while you may not be cooking in it, it is actually using power to run the clock functions. So, if there was a power surge, it damages a part on the main board called the Low voltage transformer. It takes the 120 volts from the wall and drops it down to the voltages the board needs to operate, sometimes 5,12 24 or maybe 30 volts. If the primnary winding gets damaged from a surge of some sort. it will no longer light up if that small transformer was damaged. That can happen without even blowing the fuse as the small wires in the transformer were never meant to carry the 15 or 20 amps the fuse is rated at. So the transformer goes bad and the unit is dead but no blown fuse. Have to check the primary winding of the low volt transformer to see if it has continuity. If not, will need new main circuit board. Sorry But $$$$$

could be anything from a bad mag or door switch or even a bad connection at the mag. Need more details. Any odd sounds??? A louder more pronounced humming sound??? Bad smells?? etc

A thermal protector on the magnetron may have opened. Normally, these reset within a few minutes. If you've had the oven off for more than an hour, and it's still lifeless, then you may have a bad connection somewhere. A defective magnetron will not cause an oven to be dead if the main fuse has been replaced - at least not immediately. If you need further help, I’m available over the phone at https://www.6ya.com/expert/david_29ad5d1dd86564b0

Noise may be due to turn table motor or cooling fan,watch and diagnose,if turn table motor is noise than replacement is solution,in the case of fan noise clean & oil it.

This usually means a defective control circuit board. Contact manufacturer for help.