LMHM2237ST (CSBELGA) LG Microwave Oven Combo - Instructions

I went to LG website enter model number and was given a list of parts that need to be replaced with a percentage of which part fails the most. I order micro switch PS3522738 which arrived and PS3529293 was backordered. I installed the one that arrived. The microwave worked briefly. I reordered and waited for both switches to arrive and installed both. The microwave still doesn't work.

Removed some cosmetic panels. Removed the assembly with micro switches. Examined the faulty switch by checking the clicking action of switch. Two others were ok by this method. Replaced the switch with new one. Works fine so far. Thanks to web site and YouTube videos.

I took the cover off and just put the new charcoal filter in

Take cover off microwave. Check door switches to determine which one was faulty.Remove and replace faulty switch.

Not hard to replace. Just remember the clip goes under the top not on top of the top.

I followed an old appliance repair forums post from 2008 that discussed this exact common issue with this LG model. It took me quite a while to find the info. Then I used the schematic diagrams on your website to find where the part was located inside the microwave. I removed the outer cover. I tested all components including the thermostat for continuity with a multimeter. I discovered there wasn't any continuity in the thermostat so ordered the part and replaced it. Everything works like a charm! Thanks for the great, fast service.

Part ordered was not at all what was expected. The part was inexpensive but with tax the cost was outrageous. I waited forever to get the part and it had nothing to do with the part I needed. When the part arrived I threw it away. It was a total waste of time and money. Extremely disappointment. All I needed was the black plastic square covering inside over the screw that holds the handle in place. While cleaning the inside of the handle the black square little piece broke. Now my handle is loose at the bottom. I have to open and close the microwave being very careful by using the top of the handle.

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

You just pull out the clip but the the hard part is doing that without bending the metal hole the holds the clip. If you do bend the hole the clip will not fit flush. Just get a flat screwdriver and reshape the whole.

I verified I had 120 volts going into transformer when the microwave was supposed to be running. The capacitor and HV diode both tested good. Be sure to discharge the capacitor before working in this area. This isolated trouble to either the transformer or magnetron. The windings of the transformer measured good. So ordered a magnetron. It was very easy to swap. There were 4 screws and one connector. This fixed our microwave.

Inserted plastic lugs in place, slid to right and it fit perfectly!!!

Just replaced the inner turn table glass tray

I opened the door and slid the tray into place.

Removed the phillips screws from the base.

Using a # 10 secure driver, remove the motor. (I recommend obtaining a secure star driver set to be sure you have the right size)

Replace the spacer, which is a separate part from the motor.

Reinstall the spacer and motor.

Reinstall the bottom panel.

Enjoy!

Used a Motor cycle Jack to remove both unites combined. Removed side panels exposing internal working parts. Removed nonworking Magnetron and replaced it with new Magnetron. The process was completed in about 1 hour.