Question about Microwave Ovens
Heating performance is zero
Please make this test and fix it. God bless you
Posted on Nov 19, 2013
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Posted on Jan 02, 2017
SOURCE: Microwave Oven not Hot
Common faults or combinations of faults:
Main processor board is defective.
Control devices, thyrisistor or relay on the processor board has failed, and or the drive components to this device.
Defective safety switches.
High voltage power supply failure. Usually the high voltage rectifier, and or the power transformer, and or the main high voltage capacitor, and or the magnetron.
I suggest that you DO NOT mess inside your microwave oven. This is probably the most dangerious appliance in the home next to the TV set. There are very high voltages employed. If you do any maintenance on a microwave oven and if something is not right there is also risk of high frequency EMF radiation exposure.
After opening a microwave oven and doing service on it. We always did a ratiation test to make sure that there is no leakage while it is in operation.
I suggest you do some reading at the links below.
Microwave Oven Safety:
Excellent article about microwave ovens:
Posted on May 26, 2008
With the symptoms you
have, I would most strongly suspect a shorted high voltage rectifier
diode or a bad magnetron, or a loose and possibly corroded connection on the magnetron's terminal.
The diode is a fairly cheap fix, and the mag will cost more.
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 be a "mini-manual" (tech sheet) hidden inside the unit behind the control panel or hidden on the left side behind the grille, which is very helpful when troubleshooting, testing, and locating components.
At our Web site, we have a video available showing how to remove a typical over the range control panel assembly in under 5 minutes.
If you don't find yours, or if you want to look at it without disassembling the oven, you can download it here.
Here are some links you or someone you know can use for test help, but read their safety warnings first:
http://www.gallawa.com/microtech/diode.html (if it's not shorted, it's probably okay)
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.
Posted on Dec 15, 2008
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