Question about Samsung SMH7178STD Microwave Oven

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No buzzing sounds wilbur...

Sounds normal but when you take your cup of water out of the microwave it is still cold. Microwave is not heating the food.

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Its probally the magnetron

Posted on Apr 04, 2008

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When microwave is started, why does it make a loud buzzing sound--like a Skil saw sounds?


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Jenn air microwave makes zapping sound and won't heat food


Possible bad inverter board (power) and or the Magnetron which does the main heating.

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Microwave won't heat


Sounds like the magnetron has failed. :(

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Microwave Not Working


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heatman101

Jul 09, 2010 | Whirlpool GT4185SK Microwave Oven

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Burning smell and won't heat.


If it buzzes real loud it's probably the high volyage diode. However some times if it smells it's the transformer. Usually the diode is a cheap fix ~$10.00 but this model the diode is $50. It's number 50 on the link below. Let me know how it works out or you need anything else.

http://www.searspartsdirect.com/partsdirect/getSubComp.pd?modelNumber=JVM1440BH01&productCategoryId=0123370&brandId=0432&modelName=MICROWAVE&diagramPageId=00001&documentId=G0312014&pop=flush

Apr 19, 2009 | GE JVM1440 Microwave Oven

2 Answers

Microwave doesn't heat up


There are three solutions (source) =>

http://www.partselect.com/repair.aspx?appliance=microwave&part=no-heat

Power Diode

A diode is an electronic component that readily passes current in one direction only and blocks the flow of current in the opposing direction. If your microwave's diode has become defective, your microwave will not heat and you will hear a buzzing noise. Test the diode to determine if this is the cause of your problem. Replace it if it is defective.

High Voltage Capacitor

A capacitor is an electrical device which stores electricity. A defective capacitor may be why your microwave is not heating but you are hearing a buzzing or humming noise. The capacitor will have to be tested to determine if this is the cause of your problem. A defective capacitor will have to be replaced before your microwave will work again. Make sure you discharge the capacitor before you test it, though.

Magnetron





A defective magnetron is the third possible cause of why your microwave is not heating, but you can hear a buzzing noise. Test your microwave's magnetron. Replace it if it is defective.

Dec 31, 2008 | Microwave Ovens

1 Answer

GE Microwave does not heat and makes loud buzzing noise.


I have just replaced the magnatrton for a Kenmore microwave model # 665.606.5900 as before replacing the part there is still the buzzing sound and non-heating

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1 Answer

Microwave makes loud buzzing sound when on and no heat


Have you tried putting a cup of water in it and cooking on a low power level? If it buzzes only when it is on the cook cycle, that would narrow it down. More detals might help us help you, including the model number.

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