Question about Magic Chef 1.6 cu. ft. Over-the-Range Microwave in White MCO165UW
Checked the fuse on the noise filter it's good, no lights or anything
I didn't know they had noise filters! :)
Then you have blown a fuse. Check inside the oven chamber and look for missing powder paint or signs of arcing, if so dispose of the microwave. If the inside is good remove all the screws and remove the cover. Replace the fuse. If the magnetron was making louder noises prior then replace the magnetron. Since the fuse went the giant capacitor is likely bad. While the cabinet is open make sure to look for burned wires, check the continuity of thermal cutoffs, and check the main circuit-board for burned traces or components. The relays in most electronics are known for arcing (spot welding) and staying in the wrong position. Tap them hard with the back end of a screwdriver. During all of this use safe electrical practices by having the power cord unplugged. The capacitor could still have a high charge on it so be careful.
Posted on Nov 28, 2013
Check the thermal protectors to make sure they all have continuity. Also, look for loose or burned connections on them.
If you need further help, I’m available over the phone at https://www.6ya.com/expert/david_29ad5d1dd86564b0
Posted on Jul 17, 2016
Here is a scan of the wiring diagram for MCO165UW microwave. It was inside my microwave behind the touch panel.
Posted on Jul 14, 2016
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Posted on Jan 02, 2017
In many brands, there is 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, &
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.
Some questions to help you or someone you know troubleshoot it:
When you hit "Start" to microwave, do the inside light, cooling fan, and turntable all come on?
If not, then you probably have a bad door switch or door switch mount and should see these files:
If the inside light, cooling fan, and turntable are all coming on, then the problem is in the high voltage section, and then the next questions arise:
Any unusual noises? Is it louder or quieter than usual?
We have a sound clip of what a microwave should sound like when the cooling fan and high voltage section are operating here.
A loud buzz, hum, or groan is usually a shorted high voltage rectifier diode, but a sound like gurgling into an empty coffee mug is one symptom of a failed magnetron, and yet the mag can be bad without that sound.
If there's no unusual noise, it may just be a bad connection at the magnetron.
Here are some links you or someone you know can use (in order given) for high voltage section test help, but read the safety warnings first:
(if it is NOT shorted or burned looking, it's probably fine)
(continuity can be good even though mag is bad!)
Accessing some parts may require you to pull the oven from the wall and remove the cover.
If so, the installation instructions are very handy, and it's best to have
two people since the microwave can be heavy and awkward.
For more help from Magic Chef / Ewave see here or their contact page or order parts here.
You can download owner's manuals for many Magic Chef models here.
We're happy to help you with free advice and we'd appreciate your thoughtful rating of our answer.
Posted on Dec 07, 2009
Hi this is tech crazy
The above mentioned link will be of great use to you.Just check out with it and do the necessary steps in your microwave oven
Hope that it helps you a lot
Please do rate me on the above said solution
Posted on Feb 03, 2009
Tips for a great answer:
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Unplug your microwave and turn it around and remove the screws holding cover on and then remove the cover. Look for where the power cord goes into the back of the unit and follow the black wire from the cord to where it ends. It should stop an either a circuit board or a fuse holder. Make sure that you replace the fuse with the same amperage fuse as what you take out. You will find the amp rating stamped on one of the silver collars on each end of the fuse. Good luck!
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