The fan randomly comes on when the microwave is not in use and the touch pad doesn't work for the fan. The fan will come on and not be able to be turned off by the touch pad. The fan is not controllable. It goes on all by itself even when the microwave isn't in use.
SOURCE: LG Microwave Oven LMV2053SW
That's common - it's a problem on your control panel. We regularly repair these control panels for only $32.50 nationwide. For critical safety info & detailed disassembly info, see our link in our FixYa listing here: http://tinyurl.com/yzjozk Let me know if you need further help. I appreciate your kind rating!
SOURCE: LG microwave oven
It's usually a bad door switch or a broken door switch mount. Once in a while it's due to a board problem. If you or a friend decide to work on it, we have *critical* safety, disassembly, and troubleshooting info (as well as a text file which helps in diagnosing and repairing door switch problems) at our site, which is linked at our listing here on FixYa: http://tinyurl.com/yzjozk
SOURCE: LG microwave not heating
If there is no power at all check thermal cutoff and control board.
SOURCE: LMVM1935SB - Over the Range LG - fan keeps coming on, beeping
The fan will come on if you are cooking below and the area gets hot.... is this when it happens? Sometimes random beep could be a power blip... not long enough for a reset of all things electrical
SOURCE: Touch pad doesn't work LMVM1945SB Microwave
that would be for a technician only........ electronic parts of that type are not generally self repair nor readily available
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