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Have magic chef mcd990arb. it was zapped by power surge. what could have been damaged and it is worth repair

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Well if it has been Zapped then usually it is only? the Power supply side of things, the Bridge Rectifier, Controller etc, especially if it wasn't actually "heating" at the time. But also it may have fried the Computer Chip, in the "Brain" of the microwave. These days though, it often costs more to repair than replace, and anyway I always say, if you fix it you still have a fixed thing that may have further problems, as things go. If it's new at least you can take it back.

Posted on Feb 06, 2010

Testimonial: "thanks for the input silverdragon, i might as well count my loss. I can pick up a new one for $65. Again, thanks!"


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

Hi there,
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Posted on Jan 02, 2017


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My magic chef microwave runs, but it does not heat. Is it worth trying to repair?

When you hit "Start" to microwave, note whether the inside light, cooling fan, and turntable all come on.

Also note when it's trying to cook whether there are any unusual noises or whether it's louder or quieter than usual.
I have a sound clip of what a microwave should sound like when the cooling fan and high voltage section are operating here:
Please contact me directly for full details since FixYa doesn't always inform us of follow-up questions. Remind me of the full model number and FCC ID number from the tag and your detailed symptoms.
- William E. Miller, AS-EET
Microwave Oven Control Panel Repair Nationwide "Recycling by repairing since 1982"

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MCO160 microwave and cook vent appliance problem--there was a power surge and now only the light works--is there a reset button?

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Have a magic chef mco160uw microwave. Had a recent

No! there is no reset, the power surge has more than likely damaged the keypad controller, and on the back is a circuit board that has the microprocessor with additional components that controls the vital areas of the microwave oven. If that is gone, it is cheaper to replace than to repair.

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I have( had) A magic chef microwave model MCD11E3W I must have had a power surge in kitchen refrig and oven turned off circuit breaker turned off.. All other appliances came back on but the Microwave,,...

It ispossible that the secondary transformer has failed which is the feed of the voltage for the processor timer/clock unit. So check this out with a multimeter and you can get to buy the transformer as it is a step down low voltage type., normally mounted on the processor board.
Check also if the fuse has blown if so replace.
I dont think there could be any further damage.
Credit me if this helps.

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Ours magic chef 900W MCD990ARB completely stopped. We have it in our camper and everything on that end is fine. Checked the micro in a different outlet, still no go. Any suggestions?

Well if you are lucky it is an internal fuse. Open it up and look somewhere near where the cord comes into the unit. If it is not the fuse then I suggest you replace the whole thing.
I recently was attempting to repair one. The part cost $93, a new microwave costs that or less.

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It will cook entirely different ... you will want to turn the food occasionally to assure complete cooking.

You probably have a burned out lamp ... look inside for an access panel. If none, you will have to remove the cover. There are probably 8 to 10 screws and they may be Torx - Torx is a star shape, available at auto parts store of Sears (K-mart).


Find the lamp, check it out. If burned, get a replacement at your hardware or appliance store or maybe at a Big Box store.

I hope this helps you.


Sep 26, 2009 | Magic Chef MCD990W Microwave Oven

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Magic Chef M/W MCD990ARB - heat quit

Mine did the same thing: Replaced the HV Cap and diode - works fine now.

Jul 05, 2009 | Magic Chef MCD990W Microwave Oven

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