Question about Kenmore Microwave Ovens

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It just doesn't work when I turn it on but the time counts down as it should.

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It sounds like the magnetron may have either failed or is not being supplied with the extremely high voltage required to run it.

This is a job for a proffessional but if you are safety clued up, here's instruction.
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 or moving coil meter on high resistance range for short circuit, (DVM's won't show the fault!), 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.

Posted on Jan 03, 2011

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1 Answer

Why does our new microwave not work? Can set the time and it counts down when we have pressed start but does nothing else.


There is a big fuse inside that thing. Check to see that it is not open. Could be that the magnetron, lite, and dish are all on the same circuit.

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Here is a tip that will help you to figure out what is wrong with yourMicrowave Oven....

Basic Microwave Oven TroubleshootingTips

heatman101;'][][\

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  • Disconnect the power for 30 seconds. After restoring power, do not set the clock.
  • If your model has an ON/OFF clock display, you can choose not to have the time displayed. To choose this option, press the 0 pad for about three seconds. To Turn the display back on, press the 0 again.





Touch the clock pad. Enter in the correct time of day by touching the numbers in sequence. Touch the clock pad again.

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If you have operation of some buttons and not others its the keypad. if you have no operation out of the buttons at all you have a bad control board.

If you turn your microwave on and it sets and the timer counts down you have a bad interlock switch..

please let me know exactly what your microwave does when you set the cook time

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there is a thermal fuse inside that is likely blown.
easy to replace just have to google bullet thermal fuse.

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