• ** REMEMBER! **The microwave can still shock you even unplugged!!

    ALWAYS discharge the high-voltage capacitor first if you even think your hands will come close to any HIGH VOLTAGE components.

    Jeff mentions this: Anything in the high voltage ( magnetron, capacitor, diode, wires to and from ):
    ...Use a metal ( not the shiny chrome type ) screw driver with a insulated handle to short across ( touch both at the same time ) the terminals of the high voltage capacitor to discharge it.

    From Jeff's site: http://www.applianceaid.com/component-testing.php

    Jake
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LG Microwave Error Code

ghoppe

Premium Member
Joined
May 23, 2013
Messages
4
Location
Pittsburgh
Model Number
LMV1813ST
Brand
LG
Age
1-5 years
When I use the sensor settings (sensor reheat, cook, popcorn, etc) on our LG microwave, after a few seconds, the microwave stops, beeps and flashes "F-4" on the display. Any clue to what this means and is it an easy fix?

So appreciate all your help!
 

jeff1

Appliance Tech - Moderator
Staff member
Joined
Oct 10, 2004
Messages
24,035
Location
Ontario, Canada
Hi,

May or may not help.
I couldn't find an LG microwave fault code list. Some/many others have the F4 as a bad sensor.
I did find this...

1. Disconnect sensor connector from micom
computer board.
2. Measure resistance terminal to terminal (ohm
meter scale: R X 1000)

Normal:
Approximately
BK-RD: 6.0 Kohms
RD-WH: 3.0 Kohms
BK-WH: 3.0 Kohms
Abnormal:
Infinite or approx. 0 ohm

Sensor-6501W1A013A--01058057.jpg Humidity sensor assembly Manufacturer Number 6501W1A013A

jeff.


 

jeff1

Appliance Tech - Moderator
Staff member
Joined
Oct 10, 2004
Messages
24,035
Location
Ontario, Canada
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