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Question I have a 0.7 cu. ft. Microwave oven by Magic Chef. The model # is MCB780W I purchased this one on Jan this year. It's not really working. When I plugged in, I would hear a beep sound and 0 is shown initially. But, few seconds later, it shows 3.5, then sometimes it stops in this status or starts to cook. In both cases, no button works. I found out something wrong yesterday. I was in a living room and heard a sound that the microwave oven was starting to cook automatically. Nobody set timers. then, I plugged off, and now I have this problem. Would you please let me know how I should solve this? geshek@hotmail.com

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6 Suggested Answers

6ya6ya
  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

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Posted on Jan 02, 2017

fridgetech
  • 473 Answers

SOURCE: Magic Chef 1.0 cu. ft. Convection Microwave Oven

There are several things that could cause a microwave not to heat. Most common is the magnatron and some models have up to a 5 yr warranty on that part. Check the owners manual for that info.

Posted on Oct 05, 2007

MicrowaveSvc
  • 9047 Answers

SOURCE: microwave running although not turned on

Thought I had answered this, but this is usually caused by either a bad door switch, a loose door switch mount, or possibly a problem on the control panel.

Even though a door switch clicks, it may still be bad inside. Its continuity must be checked.

Door switch or mount trouble can be caused by slamming the door or by opening the door while it's cooking without hitting the Stop pad first.

If you someone you know decide to look into it, we have critical information on safety, disassembly and door switches at our site, and our link is at our listing here on FixYa: http://tinyurl.com/yzjozk

You can find helpful exploded view diagrams and order parts by entering your full model number here: http://tinyurl.com/gv383

There should also be a "mini-manual" hidden inside the unit behind the control panel, which is very helpful when troubleshooting.

If you think the problem is on the control panel, we repair these nationwide by mail for $39.95 postpaid in most cases.

We're happy to help and we appreciate your thoughtful rating of our answer.

Posted on Apr 02, 2008

  • 82 Answers

SOURCE: Magic Chef won't work - clock works

Does the fan run?
If not, it's a control board fault.
If it does run, it's probably a high voltage problem.

Posted on Mar 16, 2009

  • 14 Answers

SOURCE: I have had the powerbolt 1000 for two years and it

  • Take out batteries and unplug powerstrip.
  • Let it sit for 1 minute, then put the batteries back in and wait another minute.
I contacted customer support... they tell me the FAQ information on their own website is incorrect. The opposite is true, therefore the following is correct:
  • If it does not beep, the powerboard needs to be replaced
  • If the unit continues to beep, the keypad needs to be replaced
Here in Canada, they will send you a new one within 3-5 days free of charge. Call customer support:

Canada: 800-501-9471
US: 800-677-LOCK


The woman was very friendly. Great customer support!

-=dån=-

Posted on Sep 14, 2009

rsmith972278
  • 160 Answers

SOURCE: After many years of use, all of a sudden it starts

Hi,
It sounds to me as if you are getting the three wrong entries alarm. Why I don't know. Try reprogramming to a different code and see if that helps. I'm including a Link to Weiser PDF Manual to do this , just in case.
CLICK BELOW
http://www.weiserlock.com/PDFs/install_sheets/pb_eng_install.pdf

Hope this Helps,
RSMITH972278
P.S. CONTACT ME IF YOU NEED TO
P.P.S PLEASE RATE ME !

Posted on Oct 17, 2009

Testimonial: "I ended up having to buy a new unit, but a good response to my question plus the PDF file was very helpful"

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MCB780W - May 27, 2017

If and when an oven is coming on or doing anything by itself, this is very dangerous and can result in a fire.

So until it is repaired, please leave it unplugged or leave the door open.

You likely have a shorting membrane keypad. MCA's parts site is not showing keypads or controller parts as being available for this model, but they may be.

You can contact them here.

FixYa doesn't notify me when there's a response, so if you have other questions, please contact me directly.

- William E. Miller, AS-EET
pupista@gmail.com
http://www.microwavecontrol.com
Microwave Oven Control Panel Repair Nationwide
"Recycling by repairing since 1982"

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Chances are its the fuse on the circuit board. You will have to remove the outer shell of the unit to access it.

clarkco

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I don't have Magic chef, however, I would try hitting cancel, unplugging the microwave and waiting a few minutes, then plugging it back in to reset it. Alternatively, you could go to your manual under troubleshoooting. I wish that I could help you more with this. Good luck to you. Please let me know if you figure this one out.

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I would definitely contact the manufacturer since most of them have a one year parts & labor warranty and they'll fix it free.

If you have your owner's manual, you can find their number. If not, please reply back with your brand and model number (or brand at least) so we can help you.

Sounds like a bad door switch or relay, and also possibly a bad magnetron or high voltage diode.

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Visit Magic Chef online and click the Cusomter Service link at the top: http://www.magicchef.com

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