Question about Viking VMOC205SS Microwave Oven

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VMOC205SS quit heating, it runs but does not heat? What part do I need?

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The heating components of a microwave r the diode, magnetron, and transformer. checking a unit plugged in can be dangerous seeing there is about 5000 volts from the step up transformer. if you have a amp probe you can check the amps at the wires powering the transformer. if you have less than 12 amps, and 110 volts at primary side of transformer change the magnetron and diode

Posted on May 19, 2009

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Fan failure /Intermittent heating


quite likely your microwave is trying to prevent it self from self destruct, because if the fan is not keeping the electronics components cool enough while its running the high limit thermo will disconnect power from the heating circuit, if the fan is not working it should be replaced , that's a techs job.

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Microwave has power, turntable works, lights work but does not heat? Any suggestions?


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Feb 25, 2011 | Viking VMOC205SS Microwave Oven

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Microwave has power but won't heat


It sounds like the magnetron may have either failed or is not being supplied with the extremely high voltage required to run it.

YOUR SAFETY IS PARAMOUNT

This is a job for a professional but if you are safety clued up, here's instruction.
Make sure the !!!!capacitor is discharged!!!!! before attempting any sort of repair.
Check the door interlock switches first then the high voltage diode with either an AVO model 8 or moving coil meter on high resistance range for short circuit, (DVM's won't show the fault!), the capacitor can fail and go short circuit, the feed fuse on the primary of the high voltage transformer and then finally, the magnetron is best checked by substitution.
Hope that helps.



Load test.

A simple safety test.
Place 1/2 litre of water in a glass container. Measure the temperature of the water.
Place in microwave and heat on full power for 1minute.
Measure the temperature after it has stood for 1minute.
If the temperature difference is more than 9 degrees Celcuis the magnetron is working and producing about 700Watts of heat.
If your microwave is labelled with 900 or 1000Watts. That is about right.
If the temperature is less then the magnetron is not working properly and may need replacing.


This a only a rough guide and any doubts you should consult an authorised service agent.

Jan 24, 2011 | Viking VMOC205SS Microwave Oven

1 Answer

Microwave does not heat


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Viking 1100 watt Microwave will not heat food


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Jan 05, 2010 | Viking VMOC205SS Microwave Oven

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Viking Microwave Model VMOC205SS little over 4


9 amps is approx. correct. Does magnatron make an odd sound when running? If not, you will need to discharge cap then clean terminals with alcahol. Replace diode as well. Should run correctly.If blows again, replace magnatron. Suggest you put a 12 amp fast blow fuse in circuit and nor a 20 fuse.If you dont have a grill or an oven, use a 10 amp fuse.

Sep 17, 2009 | Viking VMOC205SS Microwave Oven

1 Answer

Quit heating


This is a sure sign that the Magnatron has burnt out and needs replaced ( This is what cooks the food!) Replace magnatron in oven unit and all should work well!
Please rate my response!
THANK YOU!

Jan 11, 2009 | GE Spacemaker JVM1640SJ Microwave Oven

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