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Models > LMVM2055ST > Instructions

LMVM2055ST LG Microwave - Instructions

All installation instructions for LMVM2055ST parts

These instructions have been submitted by other PartSelect customers and can help guide you through the microwave repair with useful information like difficulty of repair, length of repair, tools needed, and more.

All Instructions for the LMVM2055ST
1-15 of 23
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Broken door micro switch. (unit does not start heating)

  • Customer: JAMES from BILLINGS, MT
  • Difficulty: Very Easy
  • Time to Complete: 30 - 60 mins
  • Tools Required: Screw drivers
  • 6 of 10 people found this instruction helpful
Unplug the unit before servicing. Need phillips screwdriver. Open door. Use step ladder to access and remove 2 small screws from top of the room air diffuser at top of unit. Slide diffuser slightly to the left to align the diffuser's plastic tab on the left side to rotate toward you. (The wires for the front control panel are at the far left side of this difuser, but difuser is slotted for easy removal). Once the difuser is removed you will see 1 screw at the top that secures the pannel cover on the left side of the unit. Remove screw and slide this panel slightly up and out. This exposes the plastic frame that holds the upper and lower door switches. To locate the door switches and observe how they work, close and open the door and watch the door (bayonets) open and close the micro switches. Do the (red) buttons on top of the switches move up and down when the door bayonets push and release? If the buttons do not "pop" up when opened the switch is defective. The switch frame is secured with 2 screws. Remove screws and rotate the unit out for easy access to the micro switch(s). The internal (spring?) on my unit that is suposed to allow the red (visible) button on top of the switch to "pop" up when the door is opened was broken. Carefully pry the switch outward while being careful to lift the plastic holder-piece that holds the switch in place. Be careful, there is a small pin on the frame, so rotate the switch OUT toward you while lifting (carefully) the plastic holder-piece (you will see it on top of the switch). You can use an ohm meter to test the continuity of the switches. But if the buttons don't "pop" they are defective. Replace switch and reassemble.

One of the "night" lights burned out

  • Customer: Ben from Chambersburg, PA
  • Difficulty: Really Easy
  • Time to Complete: Less than 15 mins
  • Tools Required: Screw drivers
  • 4 of 5 people found this instruction helpful
Unscrewed one screw that held the bulb cover over the bulb. Removed the cover, removed the bulb, inserted new bulb, replaced cover, replaced the retaining screw.

The Microwave was completely dead and wouldn't run, light up or anything.

  • Customer: Christopher from SHERWOOD, OR
  • Difficulty: Easy
  • Time to Complete: 1- 2 hours
  • Tools Required: Pliers, Screw drivers
  • 3 of 3 people found this instruction helpful
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.

Under-counter microwave light burnout

  • Customer: Terrance from Titusville, FL
  • Difficulty: Really Easy
  • Time to Complete: Less than 15 mins
  • Tools Required:
  • 3 of 4 people found this instruction helpful
All I needed to do was replace the bulb in our microwave. But, the bulb for this unit (Kenmore Elite, which I traced to being manufactured by LG) was one I had replaced before, several times, with the closest thing I could find at the local big box stores. That bulb type matched (pin size) but wattage was a little lower which I didn't think would be a problem. However, those bulbs burned out in a month or two. So, I ordered bulbs from PartSelect that were OEMs that exactly matched the original specs. So far so good. Be aware if you are replacing a microwave bulb & are not finding an exact match at your local hardware store.

microwave dish would not move back and forth

  • Customer: Susan from HENDERSON, NV
  • Difficulty: Really Easy
  • Time to Complete: 15 - 30 mins
  • Tools Required: Screw drivers
  • 1 of 1 people found this instruction helpful
unscrewed the bottom of the microwave and unplugged old part then took the screw out and put new one in. Super easy!

Remove old lamp cover and install new cover. Simple!

  • Customer: Ellen from BELLE HARBOR, NY
  • Difficulty: Really Easy
  • Time to Complete: Less than 15 mins
  • Tools Required: Screw drivers
  • 1 of 1 people found this instruction helpful
This site was very helpful with locating this part. Shipping was fast. Thanks!

The unit would nothing no lights no controls

  • Customer: James from Tucson, AZ
  • Difficulty: Easy
  • Time to Complete: 1- 2 hours
  • Tools Required: Screw drivers
  • 0 of 0 people found this instruction helpful
I checked the incoming power and main fuse. Both are good.removed the microwave from the wall mount, removed the door and outer cover. Removed the right side panel and replaced the main PCB. I found loose mounting screws for the vent fan and other placecs so I tighten all the hardware I could see. Pluged the unit and found the display said input time and date and the lights turned on when the door was opened and the vent worked. installed all covers and checked the microwave operations.

Microwave failed to head and light, fan, and turntable failed to come on.

  • Customer: Robert from Cedar Park, TX
  • Difficulty: A Bit Difficult
  • Time to Complete: 30 - 60 mins
  • Tools Required: Nutdriver, Screw drivers
  • 0 of 0 people found this instruction helpful
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.

tab was broken off when changing bulb

  • Customer: Shawn from Seattle, WA
  • Difficulty: Really Easy
  • Time to Complete: Less than 15 mins
  • Tools Required: Screw drivers
  • 0 of 0 people found this instruction helpful
removed old cover to lamp and reinstalled the new one by unscrewing one screw and screwing the new one back in

Microwave operated but did not heat

  • Customer: Donald from Oak Ridge, TN
  • Difficulty: Easy
  • Time to Complete: 1- 2 hours
  • Tools Required: Screw drivers
  • 0 of 0 people found this instruction helpful
Initial failure of over range microwave Aug 3rd. Control Panel worked but no heat. Took to local LG authoriaed local repair place. They fixed it quickly and we re-installed it. Worked fine for 2 months then had similar failure again. Agaim took to same authorized repairer. They kept unit for 3 months but finally concluded theu could not fix it and suggested we contact LG for a partial refund. When they tested the unit during re-assembly in my presence, there was a blue flash and the fuse blew. Since we had built a custom tile mural back splash around this unit, I brought it home, ordered a number of time delay fuses new capacitor and two new high voltage diodes. However, using my Fluke DMM, I checked the existing capacitor and high voltage diode and they checked OK so I just replaced the time delay fuse. The high voltage transformer leads had 2 possible ways to connect to capacitor and diode. Tried one way, plugged unit in and turned it on, and immediatly blew the fuse. Replaced the fuse and reversed the high voltage transformer connections,amd turned unit pn, and it worked perfectly. Since we had experienced several power failures during the time of the original failure, the repairer concluded that power spikes might be at fault, so I also purchased a TrippLite ISOBAR4ULTRA 3300 Joule surge protector between wall outlet and microwave, and re-installed over range. It has worked perfectly since.

suddenly stopped working while in use

  • Customer: Kevin from Colonia, NJ
  • Difficulty: Easy
  • Time to Complete: Less than 15 mins
  • Tools Required: Pliers, Screw drivers
  • 0 of 0 people found this instruction helpful
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

cover light discolored and cracked

  • Customer: JP from Lake Worth, FL
  • Difficulty: Really Easy
  • Time to Complete: Less than 15 mins
  • Tools Required: Screw drivers
  • 0 of 0 people found this instruction helpful
Replaced with new covers.

Backing plate which secures handle was broken

  • Customer: Joseph from Detroit, MI
  • Difficulty: Really Easy
  • Time to Complete: Less than 15 mins
  • Tools Required: Screw drivers
  • 0 of 0 people found this instruction helpful
Removed old plate with screwdriver an installed newly purchased part.

Replacement of Magnetron

  • Customer: Benjamin from Anchorage, AK
  • Difficulty: Really Easy
  • Time to Complete: 15 - 30 mins
  • Tools Required: Screw drivers
  • 0 of 0 people found this instruction helpful
I UNPLUGGED the microwave and removed the cover, using a phillips and a Torx screwdriver for the machine screws. I set these screws aside, so as not to confuse them with the later encountered screws. I photographed the magnetron to assure proper placement of the 6 phillips machine screws involved in reassembly (marking the the locations on the old magnetron would do as well. I marked the old magnetron "old", to avoid later confusion. I removed the two screws holding the shields to the magnetron. I removed 3 of the 4 screws holding the magnetron to the microwave, leaving one of the top screws. I held the magnetron securely and removed the last screw, pulling out a the part of the magnetron that penetrated the microwave. I installed the new magnetron in reverse order. One problem I encountered was locating one of the six screws, which had been pulled into the old magnetron by magnetism.

Had to lift on the door for the microwave to run, suspected the door switches.

  • Customer: Arthur from Windham, NH
  • Difficulty: Easy
  • Time to Complete: 30 - 60 mins
  • Tools Required: Pliers, Screw drivers
  • 0 of 0 people found this instruction helpful
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.
All Instructions for the LMVM2055ST
1-15 of 23