Question about LG Microwave Ovens
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Posted on Jan 02, 2017
SOURCE: Microwave works with door open
If the top is open, the upper door switch should be open and the high voltage section should not be energized. That's the way it's *supposed* to work. But that buzzing is worrysome! Does the turntable turn during this condition? Does the inside light come on? How about the fan? If not, then I would doubt that it's cooking. If so, some models will do this. It's not uncommon to notice that the fan and light will try to come on for a split second when you shut the door. This would not indicate a problem. It has to do with the timing of the door switches and a replay on the board. If it's still under full warranty, it wouldn't hurt to call a GE-authorized servicer.
Posted on Nov 07, 2006
Looking at the schematic in the service manual here, I would say relay RY6 on the small sub PCB (relay board) has shorted contacts.
That's the relay that runs both the fan and turntable.
It's possible that it may be a bad connection or driving component on that board, but in my experience, it's virtually always a stuck relay.
The part number on the relay as shown in the photo is hard to read, but it looks like "OJ-SH-112LM".
I should have one of these or I can point you to one if you want to contact me with the exact number.
Feel free to contact me directly (and please remind me of your full model number) for more information & help.
We're happy to help you with free advice and we'd appreciate your thoughtful rating of our answer.
William E. Miller
Posted on Jan 31, 2009
The light is the only thing that comes on when you open door. You either have a shorted door switch (Micro switch) or a shorted bulb. You have either a shorted bulb or bad socket. From my experience, it's the bulb. Just because it may seem to start to come on when you open the door, it's most likely bad. At least it not expensive.
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Posted on Aug 28, 2009
Testimonial: "Thanks, yes the light comes on for a second then fuse blows. I'll replace it, thanks!"
your door switch is mis-adjusted,furthermore the other safety switch on the door should have blown the power fuse in the unit,because by design for safety it produces a short circuit if door opens under operation,so if door was taken off and replaced it was not adjusted properly
Posted on Aug 29, 2009
SOURCE: Loose microwave door
My over the range microwave had a loose door, it sagged when it was open but you could lift it to close. Called repair person he said no it could not be fixed. You could see the bottom hinge was loose and slipping. I loosened 3 screws that holds the bottom on the microwave -you have to do this to change the light bulb also. The bottom hinge on the door was loose there was a hole there, so took a screw and nut to hold the hinge in place..I am a 70+year old woman-if I can you can.
Posted on Aug 19, 2010
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