First, check to make sure that the air vents are clear. Secondly, is the cooling fan running? If these are OK, (how old is this unit?) it's probably the magnetron is old and weak....... Put in a container with 2 quarts of cold water and run it for 10 minutes. It should boil water after about 4 or 5 minutes and keep boiling it for the remainder of the timer preset. If not, the magnetron is losing power.
SOURCE: How do I fix a Jenn-Air JMC7000 that does not heat up items?
The noise is coming from the high-voltage transformer being overloaded
by something shorting it out. Either the magnatron or the
high-voltage capacitor and diode. Replace the capacitor and
diode then if still not working, replace the magnatron. Its only
affordable if you do it yourself - buy the part on EBAY - lookup
"universal magnatron"
Hope ya fix it!
SOURCE: Our Jenn-Aire Model JMV8196AAS Microwave is not heating anything.
If it is working but not heating, then test the high voltage
capacitor,the rectifier diode.or the magnetron. If all this are fine,
test the control board.If turntable is not running check also the door
switch.
The diodeand
capacitors can be tested. The capacitor must be allowed discharge before
testing, or you risk to get electrocuted, evenif power is off.Capacitors
can get discharged by shorting their two contacts.
Before replacing the magnetron test also the control board.
Replace the magnetron if the checks and all of the high voltage component tests are good, but the unit still does not heat.
All locations, and description of this parts can be located using the diagram here: Counter top.
Parts must be tested to find out what is wrong.
Remember that microwaves are potentially dangerous devices if not repaired properly, the job must be done by a competent person.
A microwave energy leakage test must always be performed when the oven is serviced for any reason.
Regarding parts, contact the seller here to purchase parts.
You can also order from MicrowaveSvc , they also provide parts.
SOURCE: microwave stopped heating food.
When you hit "Start" to microwave, do
the inside light, cooling fan, and turntable
all come on?
If not, then you probably have a bad door switch or door switch mount and should
see these files:
http://www.microwavedisplay.com/safety.txt
http://www.microwavedisplay.com/disassembly.txt
http://www.microwavedisplay.com/doorsw.txt
If the inside light, cooling fan, and
turntable are all coming on, then the problem
is in the high voltage section, and then the next questions arise:
Any unusual noises? Is it louder or quieter
than usual?
We have a sound clip of what a
microwave should sound like when the cooling fan and high voltage section are
operating here.
A loud buzz, hum, or groan is usually a shorted high voltage rectifier diode,
but a sound like gurgling into an empty
coffee mug is one symptom of a failed magnetron, and yet the mag can be bad
without that sound.
If there's no unusual noise, it may just be a bad connection at the magnetron.
Here are some links you or someone you know can use (in order given) for high
voltage section test help, but read the safety warnings first:
http://www.gallawa.com/microtech/diode.html
(if it is NOT shorted or burned looking, it's probably fine)
http://www.gallawa.com/microtech/mag_test.html
(continuity can be good even though mag is bad!)
http://www.gallawa.com/microtech/xformer.html
You can find links to helpful exploded
view diagrams and part ordering help
here.
I'd recommend that your bookmark this link to your favorites.
Accessing some parts may require you to
pull the oven from the wall and remove the cover.
If so, the installation instructions are very handy, and it's best to have two
people since the microwave can be heavy and awkward.
You can download owner's manuals
and installation instructions for several brands (including Amana, Jenn-Air,
Kitchenaid, Litton, Maytag, Roper, Tappan, Thermador and Whirlpool)
here.
We're happy to help you with free advice and we'd appreciate your thoughtful
rating of our answer.
Testimonial: "This answer was extremely detailed and helpful. I will pursue the different options soon. Thanks!"
SOURCE: Jenn Air Microwave M169W will run but not heat
Hi,
Here is a tip that will help you to figure out what is wrong with yourMicrowave Oven....
Microwave Oven Basic Troubleshooting Tips
heatman101
zcvzcv
SOURCE: My Jenn-Air microwave JMV8208AAS will not heat the
This is most likely the magnetron, the high voltage capacitor, or the power diode.
For an explanation on how these things are repaired, check out this website.
http://www.partselect.com/microwave+no-heat+repair.htm
If all else fails, call an Appliance Repair Technician.
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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