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JE1390GAC - Instructions

All Instructions for the JE1390GAC
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Microwave fan would come on when door open. Timer and unit would not switch on.
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
Parts Used:
Switch,Micro
  • Dick from SANDY, UT
  • Difficulty Level:
    Really Easy
  • Total Repair Time:
    30 - 60 mins
  • Tools:
    Screw drivers
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Microwave not turning on. All other functions operate
DISCONNECT THE POWER CORD and discharge the capacitor
Leave unplugged overnight
Remove vent grille by removing the 2 philips screws
Remove the LED panel by removing 1 phillips screw
Disconnect all connectors that plug into back of the LED board completely
Remove the wires from the switches (3) at the inside edge of the microwave door
Gently remove each switch housing and test all three switches for continuity
Carefully replace non-functioning switches and reassemble the panel
GOOD LUCK
Parts Used:
Primary Door Interlock Switch
  • Tom from DENVER, CO
  • Difficulty Level:
    A Bit Difficult
  • Total Repair Time:
    1- 2 hours
  • Tools:
    Screw drivers
1 person found this instruction helpful.
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Items were not getting heated up in the microwave,
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.
Parts Used:
Micro Switch
  • Kenneth from CRYSTAL LAKE, IL
  • Difficulty Level:
    Really Easy
  • Total Repair Time:
    15 - 30 mins
  • Tools:
    Screw drivers
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no power in microwave in turn table wouldn't turn light would work act like door was open
remov cover to check voltage and found problem at the interlock switch ohm the switch and found it was open replace both switches it work fine now
Parts Used:
Primary Door Interlock Switch
  • johnny from port orange, FL
  • Difficulty Level:
    Easy
  • Total Repair Time:
    1- 2 hours
  • Tools:
    Screw drivers
5 of 13 people found this instruction helpful.
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Microwave would not heat up
Part just snapped into place and wires were reattached.
Parts Used:
Primary Door Interlock Switch
  • Suzanne from POWELL, OH
  • Difficulty Level:
    Really Easy
  • Total Repair Time:
    15 - 30 mins
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M/W would not start. control panel OK
unplugged power
removed main black cover.
located part WB24X10047 and replaced
Parts Used:
Primary Door Interlock Switch
  • Jeffrey from FULSHEAR, TX
  • Difficulty Level:
    A Bit Difficult
  • Total Repair Time:
    30 - 60 mins
  • Tools:
    Pliers, Screw drivers
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quit working
the repair kit was useless the toggles were to big to go through the top the threads on the bolts interrupted the toggle i had to drill the holes thole to except the toggles I got bolts at the hardware store what a mess
Bob
Parts Used:
Kit Assembly
  • Bob from OLD TOWN, FL
  • Difficulty Level:
    Really Easy
  • Total Repair Time:
    More than 2 hours
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suddenly stopped working while in use
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
Parts Used:
Micro Switch
  • Kevin from Colonia, NJ
  • Difficulty Level:
    Easy
  • Total Repair Time:
    Less than 15 mins
  • Tools:
    Pliers, Screw drivers
1 of 2 people found this instruction helpful.
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Items were not getting heated up in the microwave,
Easy, and the microwave still doesn't work.
Parts Used:
Switch,Micro Micro Switch
  • Kenneth from CRYSTAL LAKE, IL
  • Difficulty Level:
    Really Easy
  • Total Repair Time:
    15 - 30 mins
  • Tools:
    Screw drivers
1 of 2 people found this instruction helpful.
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Microwave operated but did not heat
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.
Parts Used:
Fuse,Time Delay
  • Donald from Oak Ridge, TN
  • Difficulty Level:
    Easy
  • Total Repair Time:
    1- 2 hours
  • Tools:
    Screw drivers
1 of 7 people found this instruction helpful.
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Microwave would turn on ,BUT turn table would not turn and oven would not heat.
Took off cover , unpluged switches , took off switch assy, off/on test hooped and howlered for about 5 mins .Then laughed about other sites said could get those switches. Just wanted to say I LOVE Partselect. Super fast del , great price. JUST AWSOME!!!!!!!!!!!!!!!!!!!!!!!!!!!!
Parts Used:
Primary Door Interlock Switch
  • Earl from New Philidelphia, OH
  • Difficulty Level:
    Easy
  • Total Repair Time:
    15 - 30 mins
  • Tools:
    Screw drivers
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Had to lift on the door for the microwave to run, suspected the door switches.
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.
Parts Used:
Micro Switch Switch,Micro
  • Arthur from Windham, NH
  • Difficulty Level:
    Easy
  • Total Repair Time:
    30 - 60 mins
  • Tools:
    Pliers, Screw drivers
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Door Interlock Switch Failed
Removed cover, diagnosed problem, ordered part from Parts Select, received part in 2 days, replaced part, tested and replaced oven into built in space.
Parts Used:
Primary Door Interlock Switch
  • Michael from Littleton, CO
  • Difficulty Level:
    A Bit Difficult
  • Total Repair Time:
    More than 2 hours
  • Tools:
    Pliers, Screw drivers
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When trying to run, intermittently, the light would come on but the tray wouldn't rotate or cook. When the door was open, the tray would intermittently rotate.
I pulled out the unit and found 2 interlock switches that are depressed when the door closes. After cycling the door open/closed I found that one of the switches occasionally would stay depressed. The repair was easy (after I took off the panels so I could get to the switch) I simply removed 2 screws that attached the interlock switch assemblies to the main unit. Then I popped out the defective switch and popped in the new one. This did indeed fix my problem.
Parts Used:
Primary Door Interlock Switch
  • Sam from Chandler, AZ
  • Difficulty Level:
    Easy
  • Total Repair Time:
    15 - 30 mins
  • Tools:
    Nutdriver, Screw drivers
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Microwave failed to head and light, fan, and turntable failed to come on.
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.
Parts Used:
Micro Switch
  • Robert from Cedar Park, TX
  • Difficulty Level:
    A Bit Difficult
  • Total Repair Time:
    30 - 60 mins
  • Tools:
    Nutdriver, Screw drivers
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All Instructions for the JE1390GAC
16 - 30 of 30