Question about LG Microwave Ovens
When using sensor cook unit runs for about 10 seconds,stops and displays error code F4
Posted by Anonymous on
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Posted on Jan 02, 2017
F4 means an open humidity sensor, but sometimes this error is bogus and can be reset by unplugging the oven for a minute or so.
manual: exploded view:http://www.microwavedisplay.com/keypad_replacement.pdf
Enter model number at this site to order a part if need be
Posted on Feb 08, 2009
SOURCE: Hi. I pressed the 'quickstart'
first thing I would suggest is a hard reset. Unplug the unit for a
minute or so. Then plug it back in, set the clock and try again.
If that doesn't work, leave it unplugged for maybe an hour. Then let us know if the hard reset does not fix it.
It may be a problem with a door switch or door switch mount.
Posted on Sep 28, 2008
I tried a solution posted on another posting http://www.fixya.com/support/t242480-stops_cooking by placing the conductive plastic behind the control panel and it worked.
Posted on Jan 06, 2008
Tips for a great answer:
If the microwave runs for a few seconds and then shuts off, a door switch might have failed intermittently. Check each of the door switches for any signs of overheating, arcing, or burning. Also check each of them for continuity. Replace any of the switches that is visibly damaged or that only has continuity intermittently
the microwave runs for a few seconds and stops the touchpad and
control panel might be defective. There are several other components
that can cause this problem, be sure to check any other components
before replacing this board.
the microwave runs for a few seconds and stops the touchpad might be
at fault. This is not common. Generally speaking, if the microwave
display is working and some of the buttons respond correctly but
some don't, the problem is with the touchpad.
the microwave runs for a few seconds and stops the thermostat might
be defective. Watch our video on testing thermostat
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