Question about Microwave Ovens

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My microwave just made a loud sound. It still runs but doesn't heat up. Is it likely a fuse & if so what do I do?

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Hello, if your microwave made a loud sound and now it doesn't heat up your food, if it is under warranty then contact the manufacturer or where you bought the appliance and see if there is a warranty, if no warranty then i would just recommend replacing the unit as most microwave does not have user replaceable parts, best bet is to get a new microwave.

Posted on Dec 05, 2016

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Fuses make very little sound when they blow so a loud sound in a microwave is an expensive sound
best take it in for a proper diagnosis and quote as many loud sound repairs cost more to fix than a new unit

Posted on Dec 05, 2016

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Posted on Jan 02, 2017

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GE spacemaker GL1800 runs but does not heat


For that sound it will need atechnician but for not heating you cqn replace fuses

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Electrolux microwave model fgmv185kfa made a loud pop and now won't heat anything and sounds louder than normal when running. Everything else seems to b working fine


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1 Answer

Microwave runs but doesn't heat.


The sound you heard was an Arc from the magnetron which provides the microwaves for heating, this means the magnetron has developed a short which unfortunately means you are now in the market for a new microwave as the cost to repair is not viable due to the decrease in replacement microwave cost over the last few years.

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Fan is loud and almost sounds stuck and the food does not heat at all. Now it died all together. No lights on. Is it worth fixing?


From your the description the magnetron has failed, "heats food" the exhaust fan has seized which keeps the magnetron cool when running, and finally the main fuse has opened, It is far cheaper to replace the microwave oven than repairing it.

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Runs normally, but makes loud hum. not heating. in defrost mode, loud hum, then normal sounds, then loud hum, then normal...


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Here is a tip that will help you to figure out what is wrong with your Microwave Oven....

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2 Answers

Microwave popped and now does not heat


Okay, first we need to separate the situations. You were boiling water on the stove and had the range hood fan running to **** up the steam. Then you put something in the microwave to heat and you heard a pop and then zip-o.

The water on the stove has nothing to do with the situation, the fan you turn on is not part of the microwave, so it has nothing to do with the microwave.

The pop you heard and then the humming suggests the magnetron failed. You said you found a blow fuse and replaced it and still nothing, right? The magnetron is the most likely culprit...I would think it is safe to say that the magnetron shorted and drew enough current to blow the fuse.

Replace the magnetron and if that doesn't work, let me know here. Good Luck!

Sep 14, 2009 | Sharp R-1480 Microwave Oven

1 Answer

Microwave will not heat


Q - The microwave makes a loud "hum or buzz" noise but will not heat up the food?
A - 9 times out of 10 this is usually this is a bad magnetron, the other time is sometimes a bad high voltage diode. See components section.
Q - My microwave is running and sounds like it is working but will not heat up anything.
A - Many thing can do this but, common things are....loose high voltage wire.....poor solder joint on board.....magnetron.....power relay.....
 Q - The microwave display counts down and the inside light is on,  but nothing is heating and the fan is not running.
A - This most commonly is a bad door switch, other possible problems are a faulty relay or solder joint on the power module, but a bad door switch is most common.
Q - The fan in my microwave oven is not running will this hurt my microwave?
A - YES, the fan cools the magnetron and electronics, take the microwave in for service, most fans are not too expensive to replace.
Q - My microwave blows the fuse inside itself as soon as I push the start button.
A - Usually a shorted high voltage capacitor...see components section.



Mar 06, 2009 | GE Spacemaker JVM1640SJ Microwave Oven

1 Answer

No heat, does not cook


Q - The microwave makes a loud "hum or buzz" noise but will not heat up the food?
A - 9 times out of 10 this is usually this is a bad magnetron, the other time is sometimes a bad high voltage diode. See components section.
 
 
Q - My microwave is running and sounds like it is working but will not heat up anything.
A - Many thing can do this but, common things are....loose high voltage wire.....poor solder joint on board.....magnetron.....power relay.....
 
Q - The microwave display counts down and the inside light is on,  but nothing is heating and the fan is not running.
A - This most commonly is a bad door switch, other possible problems are a faulty relay or solder joint on the power module, but a bad door switch is most common.
 Q - My microwave went dead when I opened the door ( same problem as closed the door ).
A - This often is a stuck or faulty door switch and it has blown the interior microwave fuse.
 
 
Q - My microwave is completely dead.
A - House fuse has blown or interior fuse inside the microwave has blown ( usually a part inside the microwave makes this fuse blow ) Sometimes a bad fuse holder inside the microwave cannot hold the fuse tight enough and the fuse will blow as well. 
 
 
Q - The fan in my microwave oven is not running will this hurt my microwave?
A - YES, the fan cools the magnetron and electronics, take the microwave in for service, most fans are not too expensive to replace.
 
 
Q - My microwave blows the fuse inside itself as soon as I push the start button.
A - Usually a shorted high voltage capacitor...see components section.

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