Question about Magic Chef MCD1311ST Microwave Oven

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The unit shuts off after 2.5 to 3 minutes of heating. It remains off for 4-5 minutes and then can be re-started.

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I would bet that either your internal cooling fan is not running, or the magnetron is otherwise overheating.

We have a sound clip of what a microwave should sound like when the cooling fan and high voltage section are operating here.

It is vital that the cooling fan runs, or the magnetron will be destroyed.

Let me know if I can help you further.

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

Posted on Aug 23, 2010


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RE: Samsung microwave SMH7187STG mfg'd 5/08. I heated cup of tea 2 min.Then I closed micro's door & micro emitted a continuous electrical buzzing sound.I opened door & buzzing stopped.

The cook relay on your control board is shorted, and the unit is cooking whenever you close the door.

When the magnetron overheats, its thermostat opens, shutting power down until the unit cools to a safe level, then power is restored.

I regularly repair these with my $54.95 service, which includes insured return shipping.

Details are here, or for full information and instructions, please e-mail me here at and remind me of your full model number and symptoms.

Dec 20, 2016 | Samsung Microwave Ovens

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Solution-GE spacemakerXL microwave oven model:JVM16505H01

Sounds like you have a bad smart board, you can try unplugging the unit for five minutes and then back in, if you are lucky this may correct the problem...good luck

Feb 18, 2014 | GE Microwave Ovens

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My GE GDL20KCSABS has been making odd rhythmic clicking noises for a long while. We had a power failure and It started working intermittently. The freezer worked and the fridge didn't; now neither are...

Hi Rob. I need to ask if you have done the unplug it for 30 minutes routine. What happens when there is a brief power outtage is the coolant system is not stabilized so the internal compressor temps and pressures are very high. As a result the compressor tries to start with those internal high pressure and the only thing that happens is the Klixon thermal overload will cycle about every 4 - 5 minutes but the compressor will not start. As a result of that cycling and the compressor not starting the interanl compressor heat remains very high and self heats in the process. Hence I recommend you unplug the unit and possible place a fan directed toward the bottom of the unit to assist in cooling it down. After 30 minutes plug the unit back in and see if the compressor starts.
Just a note about appliances damaged by power.... you may want to contact your local unility. There is a good chance they can be held liable for the damages as a result of that outtage especially if there was a high voltage surge as a result of power restoration or initial power failure.

Your main circuit board is item 801 of this link

and appears to be on the back of the unit. Access panel for the main board item 415 must be removed to change the main board.

Just a note item 621 on the side of the evaporator is a thermal fuse. It can cause this problem also. It is a very remote possibility though.

Thanks for choosing FixYa.


Aug 29, 2010 | Microwave Ovens

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Microoven stops after 3 to 4 minutes and then it can be started only after 15 to 20 minutes cooling again it trips after 3 minutes

the thermocouple located on the magnetron is either weak and sensitive to heat and goes out too soon,otherwise it can be the magnetron tube itself starting to draw too much current and overheating which would lead to this component shutting off power to the magnetron tube,if it doesnt seem too hot when it shuts off,then its this thermocouple on the magnetron tube

Jul 28, 2010 | Electrolux Microwave Ovens

1 Answer

Microwave not heating, but does count down minutes.

Press clear/reset button and hold 5 seconds. If this doesn't work unplug unit or shut off breaker for 10 seconds.

Sep 25, 2009 | Hotpoint RVM1435 Microwave Oven

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Total power loss during use

Check the voltage on the outlet,make sure it is 115v -- 122volts max, any less will cause it shut off, make sure the polarity off the outlet is correct and it is grounded,check all of your wiring connections, if all this is ok replace unit with a different unit or different supplier of unit

Jan 26, 2009 | Microwave Ovens

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Whirlpool over the Stove Microwave

This sounds like the unit is defective and if I were you I would return for replacment!

Dec 16, 2008 | GE Spacemaker JVM1640SJ Microwave Oven

1 Answer

GE JVM240 microwave - shut door, fan runs,can't set timer or cook

The "main" relay on the control circuit board is stuck (shorted) and needs to be replaced.

We regularly repair these control units for customers nationwide by mail for $39.95 postpaid in about a week with a one-year guarantee.

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.

Feel free to contact me directly (and please remind me of your full model number) for more information & help.

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

William E. Miller


Dec 01, 2008 | GE Spacemaker JVM1640SJ Microwave Oven

4 Answers

Microwave shut-off within 2-3 minutes

Why don't you return it? I think this is a common problem. We returned ours to Home Depot with no questions asked.

Nov 12, 2008 | Magic Chef CMV1000B Microwave Oven

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Panasonic NN-S533WF Microwave

because of high voltage circuit thats happend ,please check highvoltage circuit may be short circuit or any companent burntout. check magnetron and high voltage diodes etc.

Sep 29, 2007 | Microwave Ovens

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