LTM9020 LG - Instructions

i unplugged the unit,unscrewed the outer shell so that all the wiring and internal components were visible.starting at the first of three micro switches i removed the slip on terminals installed the alligator clips too the wires so the switch would now be bypassed.i made sure the wires and clips were not touching anything plugged unit in and it worked.i then installed the new switch and closed up the outer shell

your part and YouTube video (which just happened to be my microwave)
changed bottom microswitch...done and dusted in 20 minutes...your $14 part 3B73362F saved $350!!!

Needed to raise the part to match the ring. I used peanut butter to hold plastic shim while replacing to hold it in place. Built in Oct. 2009.

I looked up my problem on the internet and found a very helpful video. Microwave on video was different brand but the internals and methods were very much the same. The video made it simple and easy to fix. Found the replacement switch on the LG parts site and ordered. Two different switch types. One with red switch, the other green. Part was $7.28. Saved a bundle in service costs. Here is the repair video.

https://www.youtube.com/watch?reload=9&v=_AglBJoHgDs

Remove the rear casing of the microwave using both a Phillips head screw driver. The lower rear screws require a star shaped bit with a hole in the middle (security bit). Once the rear casing is removed, it is very easy to access and replace the bulb. But the bulb sent was NOT identical to the original which has a straight fitting into the receptacle. The one sent had a fitting with a 90 degree. The bulb did not quite fit in place, but I secured it with some black electrical tape.

tested cap. with ohm meter which showed a short. A new HV cap., a fuse and it is working fine again.

Problem was due to a faulty door switch. Replaced with a new switch and the microwave now works fine! Only thing that was tricky was that LG uses the hex screws with a peg in the middle to keep the microwave cover on. Had to use a small screwdriver and pliers (on the screwdriver) to unscrew the screws.

Removed door from microwave and then popped the inside widow trim ring off. Removed 4 screws from the window bracket, replaced the latch with a new part and then assembled.

Easy, and the microwave still doesn't work.

Pop old one out and replaced it with new one.

Ordered the switches from Partselect, arrive in two days. Had trouble removing the plastic connectors from the old switch terminals, one of the plastic protectors broke, but was able to reuse it. It took a little figuring out how to remove the existing switches. Must push in a tab and rotate the switch on a little pin, then remove. Must be careful not to break the plastic tabs holding the switches in place. Replaced all (3) switches at the same time. All in all it was pretty easy.

Although the repair was as simple as opening the box the plate was delivered in, it was the ease of finding the "right" part for our microwave/convection oven. Thanks to Parts Select it was as easy as the click of the mouse!

I love this microwave...but occasionally someone puts something in it that melts the glass plate. It takes about 2 minutes to find it on the site and order it...wait a few days...and then a second to put it in. It's great to continue to be able to buy things like this at a reasonable price and to keep good appliances going.