Question about Magic Chef Microwave Ovens

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I have a magic chef microwave that heats well but when the door is closed it hums and get really hot on top while not in use. Eventually it will stop working all together until it cools down then I can plug back up and it works again. As long as the door is open it is fine but as soon as the door is closed it starts to hum and heat up, again while not in use. Is this worth repairing. Model number is MCM1110ST

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  • 178 Answers

This one actually sounds like the unit is cooking when the door is closed without blowing the fuse as it is supposed to do. Unplug it from the wall and let it cool down, which it probably already is. Put a cup of cold water in it, close the door and plug it in for one minute. Unplug it from the wall and check the water. Did it heat up? I'd bet that it heated the water up. Sometimes the cook relay sticks closed and it stays in cook mode. This condition is supposed to blow the fuse but really rarely it doesn't. I've only seen this happen 3 or 4 times out of about 14,000 units I have looked at in my career.
It would need a new control PCB and new door switches and probably a new magnetron.

Posted on Oct 28, 2013

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Posted on Jan 02, 2017

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SOURCE: Magic Chef Microwave

problem solved

Posted on Jul 07, 2008

ginko
  • 19396 Answers

SOURCE: GE SPACEMAKER JVM1650

When door open the microwave should not work at all, if the turntable and light come on with the door open , if they do , then this is an additional problem with door switch and must be fixed.

Regarding humming noise and no heath, Test the high voltage capacitor, the rectifier diode.or the magnetron.

If it additionally does not spin and no light, then check also the door switch.

The diode and capacitors can br tested. The capacitor must be allowed discharge before testing, or you risk to get electrocuted, even if power is off. Capacitors can get discharged by shorting their two contacts.
Replace the magnetron if the checks and all of the high voltage component tests are good, but the unit still does not heat.

All locations, and description of this parts can be located using the diagram here: Counter top.

Parts must be tested to find out what is wrong.

Remember that microwaves are potentially dangerous devices if not repaired properly, the job must be done by a competent person.
A microwave energy leakage test must always be performed when the oven is serviced for any reason.

Regarding parts, contact the seller here to purchase parts. (here in UK).

Posted on Apr 27, 2009

  • 8404 Answers

SOURCE: no heat on magic chef microwave

Check the door safety interlock switches.

Posted on Dec 29, 2009

heatman101
  • 43501 Answers

SOURCE: Microwave Model JVM 1870 stopped heating, all else works (timer)

Hi,
Here is a tip that will help you to figure out what is wrong with yourMicrowave Oven....

Microwave Oven Basic Troubleshooting Tips

heatman101

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Posted on Sep 30, 2010

KevinWhite
  • 1902 Answers

SOURCE: My magic chef microwave model

Hello & Welcome to FixYa

The door switch is bad and needs replacement, as it is bad so the control senses that the door is not closed so won't heat. Please get back to me if you have any other questions.

Kevin

Posted on May 14, 2011

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