Question about Magic Chef CMV1000B Microwave Oven

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Magic Chef mco153ubf

Bulbs underneath burnt out and when turning on microwave it just hums .Changed the bulbs and still get the same results. Everthing else seems to work.

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I had the same problem. My Magic Chef, MCO153UBF Microwave had similar problems. The Magnatron, Cooling fan, Turn table and under hood lights were not working at all after hearing a pop sound under the control panel. Thought it was the fuse but the fuse was fine after testing and replacing. I checked the circuit breaker wired to my house and saw it had a break to my kitchen outlets so i flipped the switch to get back the kitchen outlets. Then I checked the microwaves Control Panel ( Printed Circuit Board) underneath and saw to traces were burnt. I soldered the two trace lines and the fixed the problem.

Posted on Feb 17, 2008

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We see this a lot. The problem is almost certainly on the control panel, which we regularly repair nationwide for $39.95 postpaid.

This light failure often occurs when a bulb goes out and the filament shorts, or when the bulbs are removed or installed without first unplugging the oven from the power line. Either can cause such a failure on the controller.

This often can affect the exhaust fan operation, too. The lights and fan can be inoperable or stuck on.

If you or a friend decide to look into it, we have critical safety information and disassembly information at our site, linked here on Fixya:

Posted on Nov 22, 2007


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Posted on Jan 02, 2017

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There are two things that come to mind, the magnetron is starting to fail, or the strapping has come loose on the fan motor housing, unplug microwave oven and remove top, [several screws] carefully inspect the fan for any loose mounts and tighten.

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Tin foil or steel plates in a microwave will burn it out. I suspect it is or has burnt out. Never put anything steel in a microwave.

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If there's no obvious removable cover over the bulb (and the owner's manual doesn't address it) some disassembly may be required.

Always unplug a microwave before removing or installing any bulbs.

The screws you need to remove should be pretty obvious, but a special driver (such as a T20H type or GTXH20-100) may be needed.

Be sure to put all the screws back in the right holes, since some may be special grounding screws.

Bulbs can be had in most grocery stores, hardware stores, home improvement centers, and big box or department stores.

Many models use halogen lamps. You must not touch the new one with your bare skin, as the oils will shorten the bulb life.

We're happy to help you with free advice and we'd appreciate your thoughtful rating of our answer.

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I tried the usual things, then checked the outlet in the cupboard where the unit is plugged in.....It was okay, but then I noticed a separate electrical cable going into the wall at the outlet. I went to the breaker box downstairs, found a breaker marked "Microwave Oven", flicked it off and on and away the microwave oven went....It is now okay. I guess the thermostat had turned everything off when it became too hot....
anyway all okay now....thx Janet

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The turn table and fan are connected in series with the bulb,as you have mentioned that you have replaced bulb,so please check again for any loose contact on bulb holder or bulb continuity again.

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