I HAVE REPLACED THE CERAMIC FUSE 2 TIMES. THE ORIGINAL LASTED 11 YEARS, THE SECOND - 1 YEAR, AND THE THIRD 6 MONTHS.
IS THERE A REASON, OR ANOTHER COMPONENT I SHOULD BE REPLACING?
The fuse holder may be loose.
With the microwave unplugged, if you can easily turn the fuse with your thumb & forefinger while it's in the holder, it has overheated and fatigued and should be replaced.
Simply squeezing its terminals together with pliers is not really a good solution.
When a connection is loose, heat results, which eventually melts the fuse internally.
This is usually evidenced by a very tiny ball of solder at the point where the end cap meets the body of the fuse.
You can use a generic holder - it's a lot cheaper than ordering one. The connectors should be 1/4" tabs and it should be rated at 20 amps or better.
You should be able to get one from a home center or local appliance parts store.
If it's not loose, then it may be a failing magnetron or high voltage transformer pulling too much current.
We're happy to help and we appreciate your thoughtful rating of our answer.
It sounds like the magnetron may have
either failed or is not being supplied with the extremely high
voltage required to run it.
Make sure the !!!!capacitor is
discharged!!!!! before attempting any sort of repair.
Check
the door interlock switches first then the high voltage diode with
either an AVO model 8 on high resistance range for short circuit, the
capacitor can fail and go short circuit, the feed fuse on the primary
of the high voltage transformer and then finally, the magnetron is
best checked by substitution.
Hope that helps.
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Hi Bob,
I have the same problem (fuse blowing often on JMC 7000). I removed the fuse and connected the wires directly but now my main fuse for MW trips/goes off:-(
I noticed that it trips or fuse is blown when i push the door relase button/latch. it never happens in the middle of a run!!
thanks,
-ak
I apparently have this same problem with our M167. The microwave completely shut off, but the main power circuit breaker did not trip. Where is this ceramic fuse located on the microwave? What type is it and where do I find a replacement? Jenn-Air manual tells me nothing.
You're not going to believe this, but my name is Robert Carl and I have the same issue with a Jenn-Air M167 microwave - just shut down at start-up - i figure there is a fuse in there somewhere but where? I have verified no blown breakers, and plugged oven into different outlet. How do you access the ceramic breaker? thanks
Never mind - found it, fixed it.
My model 167 has the same problem. Display is blank. Microwave quit working. Where is the fuse located? Thank you for your help. Steve
replace fuse on jenn air microwave
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