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LMVM1945SW (AWHELGA) LG Microwave - Instructions

All installation instructions for LMVM1945SW 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 LMVM1945SW
1-15 of 17
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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.

everything worked except it wouldnt cook

  • Customer: Joseph from N VERSAILLES, PA
  • Difficulty: Very Easy
  • Time to Complete: 30 - 60 mins
  • Tools Required: Screw drivers
  • 3 of 4 people found this instruction helpful
tested all 3 of the door switche for continuity, the top switch was faulty, replaced it,for approx $4.00 and saved a $350 dollar microwave.

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!

Bad magnetron

  • Customer: Tom from SAN DIEGO, CA
  • Difficulty: Easy
  • Time to Complete: 30 - 60 mins
  • Tools Required: Screw drivers
  • 0 of 0 people found this instruction helpful
Went on the net to determine the possible cause ordered the new magnetron and found the company manual for free. Replaced as directed and the end result is I saved on having to buy a new $300 microwave

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.

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 LMVM1945SW
1-15 of 17