Two weeks ago I went to use my microwave, however as I closed the door a flash of light appeared and the microwave went dead, with no signs of life. I replaced the fuse and still nothing, does anyone have any suggestions?
A microwave can be dead
for many reasons.
It
may be the fuse, which is usually located behind the grille, on the
floor of the oven behind the control panel, between the door switches,
or on the filter board near where the cord comes into the unit.
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.
You can download GE
owner's manuals and installation instructions here to make that easier.
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.
There
should also be a "mini-manual" hidden inside the unit behind the
control panel or hidden on the left side behind the grille, which is
very
helpful
when troubleshooting & testing.
You can usually find
helpful exploded view diagrams and order parts by entering your full
model number here.
We're
happy to help you with free advice and we'd appreciate your thoughtful
rating of our answer.
How do i get to the fuse in ge model jvm 1870
bikek5
1,092 views
Usually answered in minutes!
Thanks for getting back to me. As of now there isn't anything on. No lights, fan, display. It would seem as if a fuse blew, however i don't know if the microwave has a internal fuse. i have already checked the outlet that the microwave is using with another appliance and it works fine.
As of now I have no power at all
Have you had any trouble with the cooktop lights or the vent hood exhaust fan?
Since it occurred when you closed the door, I would a suspect door switch or switch mount issue.
But I;'ll wait for your clarification before I offer a full solution.
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