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Model MCD990ARB SS# 3513585800 . MICRO is in my 2006 camping unit and after cooking the micro will turn on by it's self and you can not turn it off but to flip breaker off. The micro gets bery hot when this happens and I'm worried about a fire.

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  • goschofl Sep 30, 2008

    Microwave turns on by itself. Fire hazard!

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5 Suggested Answers

SOURCE: micro stopped working

Try looking at the microswitches behind the door.

Posted on Apr 14, 2008

MicrowaveSvc
  • 8820 Answers

SOURCE: Micro Wave shuts down

If it stops after 22 seconds, that means the controller has detected a problem, usually a problem with the inverter or a bad magnetron.

Due to the lethal voltages used and produced, I do not recommend that an inexperienced person work on these.

You can find an authorized Panasonic servicer here.

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

Posted on Nov 24, 2008

rickzilla
  • 706 Answers

SOURCE: micro turns on but doesnot heat also turn on by self

Hello bbmasonjim,
If your micro turns on ( meaning everything seems to be working from the control panel) and you aren't getting microwave energy to heat food..you may have any number of damaged or defective components : Magnetron Tube, Filament Power Supply or HV Capacitor.. None of which are something the untrained person should mess with. Even unplugged, there is High Voltage potential inside the electronics compartment. If it is less than a year old, it may still be under warranty.. otherwise.. the cost to repair would probably be higher than the cost to replace..

Regards,
Rick

Posted on Dec 13, 2008

kdrake84
  • 262 Answers

SOURCE: Blew an egg up in

Please post your complete model number so I may better assist you. I have posted a procedure on how to fine this information below.
But first just a warning on Microwaves....
THEY HOLD A POTENTIAL FATAL CHARGE EVEN WHEN THE POWER HAS BEEN DISCONNECTED!
MY ADVICE WOULD BE TO CALL A TECHNICIAN TO SERVICE THIS APPLIANCE.


Whenever any electrical device trips a breaker usually this is a indication of either a ground short...a wire that may have been burnt...or power being over the capacity of what the breaker is capable of handling. I.E. your breaker is allowing 10 amps of power to your outlet but the appliance is sending 11 amps....thus tripping the breaker. The breaker acts as a safety for your home against fire.

Your microwave has a transformer in it. It increases this power internally to generate enough power for the magnetron to distribute a very high voltage to produce heat to your microwave. My guess is something has shorted and or the magnetron or transformer has shorted internally. Really not worth repairing.

My two suggestions to you would be to call a service tech to repair or simply replace the unit. A tech will charge you a minimum of $125.00 plus parts a nice new unit can be purchased for under $200.00

If you would like to pursue this repair you will need to know how to use a volt meter and be able to read a wiring schematic.

Please post your decision...

Best regards...

Keith

Posted on Feb 26, 2011

  • 185 Answers

SOURCE: the micro goes on sounds like its cooking but does

more than likely a defective magnetron; less likely loose h.v. connections.

Posted on Aug 06, 2011

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Hello bbmasonjim,
If your micro turns on ( meaning everything seems to be working from the control panel) and you aren't getting microwave energy to heat food..you may have any number of damaged or defective components : Magnetron Tube, Filament Power Supply or HV Capacitor.. None of which are something the untrained person should mess with. Even unplugged, there is High Voltage potential inside the electronics compartment. If it is less than a year old, it may still be under warranty.. otherwise.. the cost to repair would probably be higher than the cost to replace..

Regards,
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