Question about LG Microwave Ovens
It may be an internal fuse that popped. try a lamp or something in the outlet. if that's ok, it's probably a fuse inside the microwave.
Posted on Oct 17, 2013
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Posted on Jan 02, 2017
I had same problem last week. My GE JVM1650 Spacemaker stopped after a few seconds of heating. Owned 16 months, manufactured Jan 2005. It was the magnetron, which was replaced yesterday. The magnetron has a 10-year warranty, but I had to pay $161.00 for labor by a GE technician. The call-out fee was waived at my request. I don't know what that amount would have been, but I can't believe the $161.00 for what was about 1/2 hour labor once diagnosed. Good Luck!
Posted on Sep 21, 2006
It could easily be a bad line fuse and/or line filter. To access you will need to unplug the unit and remove the outside case. Inside the unit, where the A/C power cord comes in, there should be a small circuit card (part #237068) located somewhere with a fuse mounted on it. This is your input line filter board with line fuse. Replace the fuse, first and see if this fixes your problem. This is a 20amp appliance fuse that you can purchase at any hardware store. Make sure you place the cover back on the unit BEFORE you plug it in. It is not safe to have this area of the microwave exposed with power applied. High potentials in the 4,000 volt range are present! If the fuse does not correct your problem, the circuit card runs about $26.00. Good luck and hope this fixes your problem.
Posted on Aug 04, 2007
Is it possible someone may have sprayed cleaner directly onto the keypad area?
This causes moisture to get into the keypad and sometimes onto the control board.
This could mean that they control panel frame with keypad (membrane switch) would need to be replaced.
Can you give more details on the cleaning?
Posted on Nov 18, 2007
the service manual for this model and have uploaded it to our
site here to help you.
You will need the free Acrobat Reader to view or print it in case you don't have it.
It may be the fuse, which is usually located behind the grille or on the floor of the oven behind the control panel or between the door switches.
If the fuse is good, it may be an open thermostat or thermal cutout (TCO) / thermal fuse on or near the magnetron or on top of the cavity / body of the oven.
If it goes dead for a while during or after cooking then comes back on, the magnetron is probably overheating and causing the magnetron thermostat to open.
Then when it cools, it closes the circuit and allows power through again.
When checking TCOs or thermostats, if it has a hood fan thermostat, that should read open, as opposed to the others, which should read closed.
If the cavity thermostat needs to be checked or replaced you'll need to pull the oven from the wall.
If it went dead almost immediately after pressing the Start pad, that's usually a shorted high-voltage capacitor.
If it went dead a few seconds after pressing the Start pad, that's usually a failing high-voltage transformer.
If it goes dead or blows the breaker (or GFI) when you plug it in or open or close the door, then there's a problem with a door switch or door switch mount.
If it's intermittent or random, it may be a bad connection, usually on the control board or a loose fuse holder, or even an intermittent fuse.
You should do a continuity test on the fuse while it's in the holder (with the microwave unplugged, of course) then turn the fuse by hand or take it out and put it back in, then test it again.
If you remove the fuse, then press the meter leads against the ends, it can allow internal contact to be made and make a bad fuse appear to be good.
If you or someone you know decide to look into it, we have critical safety information and disassembly information at our site, and our link is at our listing here on FixYa.
To order Goldstar / L.G. parts, visit Vance Baldwin Electronics. You'll probably have to call them.
We're happy to help you with free advice and we'd appreciate your thoughtful rating of our answer.
Posted on Dec 13, 2008
If unit is built-in reove screws holding unit to cabinet.
Slide out about 2 inches to access 3 screws holding grill.
Remove grill to get to two screws holding control panel.
Fuse is behind control panel,
Posted on Mar 17, 2009
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