SOURCE: kenmore microwave doesn't heat up
The most likely causes are a bad door switch, a loose connector on the magnetron, or a bad magnetron. If you or a friend decide to work on it, we have *critical* safety and disassembly info at our site, which is linked at our listing here on FixYa: http://tinyurl.com/yzjozk Here's a reprint of one of our FAQS on the subject: Q. My microwave seems to be running okay, but it won't heat. A. If you are a do-it-yourselfer with the right equipment and care, you can do quite a bit of troubleshooting, but once you get near the high voltage section, it is time to be VERY sure of your actions. DANGER: Microwaves produce lethal voltages. They can kill. Before you go any further, you should read the safety warnings here: http://207.234.249.73/mwd/safety.txt If you find line voltage (100-125 VAC) on the primary of the high-voltage transformer while the oven is running, the problem is indeed in the high voltage section. If that line voltage is not present, then the problem is not in the high voltage section. Door switches would be one suspect, as well as a control panel problem. To check door swithces, see this file: http://www.microwavedisplay.com/doorsw.txt If you have or suspect control panel problems, see details of the repair service here: http://207.234.249.73/mwd/index.htm There are a few prime suspects to be aware of in the high-voltage section, mainly the high-voltage rectifier diode, the magnetron, and the high-voltage transformer. DIODE: Did the oven pop during the cooking cycle? If so, that's pretty good evidence that the diode has gone bad, not that's not the only way it can fail. High-voltage rectifier ID & diagnosis can be found here: http://www.gallawa.com/microtech/diode.html MAGNETRON: Sometimes everything looks and seems okay, but the magnetron is simply not producing heat. At other times, it may be arcing inside, and producing a noise that sounds something like someone growling into a coffee mug. It's also possible that the mag may have a cracked magnet. Check for that, too. More likely, it may be that the magnetron filament connectors have loosened (they should be snug) and, due to resistive heat, the terminal connections have deteriorated and burned loose to some degree. A photo showing that area can be found here: http://207.234.249.73/mwd/magterm.jpg . Here are some tips if you have loose connections: If the connectors feel loose, and any burning or melting seems minor, you should be able to carefully tighten the connectors with a pair of pliers, then sand or file the rusty-looking terminals of the magnetron until they are clean and shiny. If the burning is more serious, the connectors may need to be replaced. They can be obtained from home improvement centers and auto parts stores. They are 1/4" connectors and can be squeezed in place onto stripped wire with proper crimpers or a pair of pliers. Another option is to cut the connectors off the wires and solder the wires directly to the magnetron terminals. If this is done, do not apply heat to the terminals any longer than necessary. If the burning is really bad, the plastic surrounding the magnetron terminals is charred or melted, the magnetron may need to be replaced. HIGH-VOLTAGE TRANSFORMER: When the voltage transformer fails, it will often emit heat and smoke, but with the fan running, you might not smell it. With the cover off, it may be easier to smell. Also, you can look at the windings and see if they look discolored due to heat. If a high-voltage transformer is shorting, it can blow the fuse a few seconds after pressing the start button to start a cooking cycle. High-voltage transformer ID & diagnosis can be found here: http://www.gallawa.com/microtech/xformer.html HIGH-VOLTAGE CAPACITOR: The high-voltage capacitor will usually fail by shorting. When it does, the fuse will be blown right after you press the start button to begin a cooking cycle. If the capacitor is old and dries out, then it can fail by just not allowing the high-voltage to be doubled. I don't remember having ever seen this condition. High-voltage capacitor ID & diagnosis can be found here: http://www.gallawa.com/microtech/cap_test.html More information on the high-voltage circuit can be found here: http://www.gallawa.com/microtech/doubler.html Again, be safe!
SOURCE: kenmore microwave stopped heating
simply stated.. if it fails to cook.. you may have either a bad magnetron tube ( that's the part that generates the microwave energy that cooks the food) or the filament transformer feeding that magnetron is bad. In either case.. you're probably better off replacing the entire appliance than repairing it.. Hope that helps...
SOURCE: kenmore micriwave won't heat!
Here are some links you or someone you know can use (in order given) for test help, but read the safety warnings first:
http://www.gallawa.com/microtech/diode.html (if it is NOT shorted, it's probably fine)
http://www.gallawa.com/microtech/mag_test.html
http://www.gallawa.com/microtech/xformer.html
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.
Your biggest suspects will be a bad connection or relay on the control panel, a bad connection on the magnetron terminals, a bad magnetron, a shorted high voltage rectifier diode or a bad high voltage transformer.
You can find exploded views and part numbers by entering your model number at the Sears parts site.
A full Sears/Kenmore model number has 3 digits, a dot, then 8 more digits, such as ###.########
You may be able to find better part prices than Sears here.
Your magnetron may have a 5-9 year warranty, so check your manual for that. Sears may send you a magnetron if it's bad and warranty.
We're happy to help you with free advice and we'd appreciate your thoughtful rating of our answer.
SOURCE: Kenmore microwave 721 Displays 66:66 and beeps
Try first unplugging power cable for ten minutes, and see if it clears the error.
SOURCE: turntable on Kenmore Elite will not turn?
The turntable system
consists of the motor, the coupler, the turntable support with rollers,
and the tray.
You can see and hear a video of how a turntable motor should
sound when you rotate it by hand.
If
yours is not set to be off via the control panel, and it won't rotate
or it sounds like it's grinding, etc., you may have a bad motor or
plastic coupler.
If you don't have your owner's manual, you can just enter your full
model number at the Sears
parts site.
A full
Sears/Kenmore model number has 3 digits, a dot, then 8 more digits,
such as ###.########
On the resulting page, look to the right for the blue "View manuals"
button. Click there.
That Sears-related site has many free manuals. While the manuals they
list there are all free, they will ask you to register.
Many times, the owner's manual will have the installation instructions
inside.
If yours is not listed there for free, you would have to order it
through the Sears
parts site.
That's where you could also order any needed parts and find handy exploded parts views.
We're
happy to help you with free advice and we'd appreciate your
thoughtful rating of our answe
Hi,
Here is a tip that will help you to figure out what is wrong with your Microwave Oven....
Basic Microwave Oven Troubleshooting Tips
heatman101
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