Question about Kenmore Microwave Ovens
No Lights ,Cked Power ! Does this microwave have a in line fuse in the back of microwave? and a TCO sw?
Posted by Anonymous on
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Posted on Jan 02, 2017
sounds to me like the magnatron has shorted out. i don't know of a way to test them unless you have some high dollar equipment. a continuity test prob wont tell you anything. what reading did you get on the cap when you tested it?
Posted on Jan 06, 2008
This heat could have come from excess current draw due to a failing part, such as the magnetron, or an improper voltage level at the outlet. It should measure 105-125VAC.
A loose connection can also result in heat and melting.
I would recommend replacing the section of wire that's melted. You need to make a good solid connection with proper wire nuts and solid crimped connectors.
If you think the TCO may have been stressed, it should be replaced, too.
I would also check the fuse holder by seeing if you can twirl the fuse with your bare fingers while it's in the holder. If so, then it is too loose and the holder must be replaced.
You cannot just squeeze it tighter with pliers, because metal fatigue will make it go loose again, possibly resulting in a melted fuse.
Lastly, I would replace the primary interlock (top door switch). See http://www.microwavedisplay.com/doorsw.txt.
Then make sure that no one opens the door while the oven is cooking unless it is specifically called for in the cooking cycle. Opening the door while it is cooking leads to premature switch failure and heat / melting of the switches connectors and wiring.
You can find the full service manual online here.
Yours may have the revised circuit. You can see the "mini-manual" for that version here.
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.
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.
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.
We're happy to help you with free advice and we'd appreciate your thoughtful rating of our answer.
Posted on Jan 10, 2010
If the 20A fuse is blowing, it is often the high voltage transformer or magnetron. If this is the case, and the microwave is not under warranty, replace it. Residential microwaves are generally considered disposable. Parts and labor are just too expensive. A magntron or transformer can cost more that half the cost of a new microwave.
Posted on Feb 25, 2010
SOURCE: Hi my Panasonic Dimension 4
Normally when they go completely dead it's because an internal fuse has blown. It sounds like the fuse might be loose. Additionally, on the GE's, when they quit heating it's often because the power module has failed. The power module is separate from the circuit board and can be replaced without taking the MW down. However, be aware that microwave ovens have a HIGH VOLTAGE capacitor that can really hurt if you place your hand in the wrong place, this capacitor on the power supply board may just have dead leakages gases capacitors.These capacitors always bulges up on it top,or puff up on it top.Replaced these gases leakages capacitors will get your microwave oven working perfectly back..
I hope that will help to solve the problem....
Posted on Aug 11, 2011
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