Question about Microwave Ovens
Just bought this used at Lowe's last week, and they had just supposedly replaced the magnatron tube. Now it deosn't even cut on
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Posted on Jan 02, 2017
SOURCE: Noisy magnatron
First of all, if you press against the right side of the outer cover of the oven, does that lessen the noise? If so, it may be that a rubber cushion on the side of the HV transformer has fallen off.
If it had that hum but was not heating, I would first check the HV rectifier diode.
But since it's cooking, I would say your magnetron is on the way out.
Unless the warranty is about to expire, I'd continue to use it and watch and wait.
Posted on Apr 08, 2008
it sound to me as if the high voltage diode is shorted. It could be inside the capacitor or out board the cap. The capactor could also be short but this is a rarity. Diodes are a cheep item . repace it and if it don't work its probably the magnatro. good luck.
Posted on May 14, 2008
Magnatrons rarely go bad.
Check your door safety interlock switches. Do you open the door while the oven is operating?
If yes, you have burned the contacts of the little micro switches to the point that they are not functioning.
When this happens, the oven doesnt know the door is closed and will not turn the magnatron on.
Remove the cover, DONT TOUCH THE SILVER CAN, check the switches for contunity.
The other possibility is the silver can is bad - dont touch it unless and until you undersstand withat it is and what it does. It can be very dangerous.
Replacement parts locally or www.repairclinic.com
If you need more help, let me know.
Posted on Oct 18, 2009
Here is a tip that will help you to figure out what is wrong with your Microwave Oven....
Microwave Oven Basic Troubleshooting Tips
Posted on Aug 07, 2010
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