Question about Microwave Ovens

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MICROWAVE FUSE BREAKDOWN

EVERY TIME ICHANGE fuse of microwave , it does not work, what is the reason, and eveything work properly

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  • Microwave Ovens Master
  • 12,223 Answers

Follow this test and fix it. God bless you

  1. Inspect the power cord Unplug the power cord and check for voltage at the outlet. Also inspect for damage, shorts, or burn marks that can be a possible safety hazard.
  2. Bad door switch If your microwave does not work at all and you know everything is plugged in properly and the outlet is functioning, then also check the door hooks and the door release button. Using a volt-ohm meter on RX1, check your terminals. When your microwave door is closed you should have a reading of zero. Once the door is open the reading should change to infinity. If these readings do not match up, replacement of the door switch is necessary.
  3. Blown fuses To determine if your fuse has blown out, which may attribute to your microwave not running, you need to pull the fuse out using a pair of fuse pullers. Lay it down and using a volt-ohm meter on RX1, check both ends of the fuse in question. If you do not get a reading of zero, then you will need to replace the fuse.
  4. Bad fan motor Locate the fan and remove the leads. Again using the volt-ohm meter on RX1, check the terminals. If an infinity reading is displayed, it means that the fan has gone bad and requires replacement.

Posted on Nov 27, 2013

6 Suggested Answers

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Posted on Jan 02, 2017

fridgetech
  • 473 Answers

SOURCE: Matag Microwave MMV5100AAB

There is a short either in the keypad or the power board.  Unfortunately parts for this one are not available anymore.  If you could get the parts it would cost you well over $100 and would be a better idea to replace the microwave.  If this only happens when you add time then I would just use the microwave without using that option.  Would appreciate a solved rating for expert advice.

Posted on Oct 27, 2007

MicrowaveSvc
  • 9047 Answers

SOURCE: neff h7871

If it went dead almost immediately after pressing the Start pad, that\'s usually a shorted high-voltage capacitor.

If it went dead a few seconds after pressing the Start pad, that\'s usually a failing high-voltage transformer.

Here are some links you or someone you know can use for test help, but read their safety warnings first:

http://www.microtechfactoryservice.com/cap_test.html
http://www.microtechfactoryservice.com/diode.html
http://www.microtechfactoryservice.com/mag_test.html
http://www.microtechfactoryservice.com/xformer.html


We\'re happy to help and we appreciate your thoughtful rating of our answer.

Posted on Jul 06, 2008

MicrowaveSvc
  • 9047 Answers

SOURCE: GE Dual Wave II microwave oven blowing fuse

It sounds like a shorted high voltage capacitor, a fairly cheap fix. But if it's good, I would suspect the high voltage transformer.

Here are some links you or a friend can use for test help, but read the safety warnings first:

http://www.gallawa.com/microtech/cap_test.html
http://www.gallawa.com/microtech/xformer.html

There should be a "mini-manual" hidden inside the unit behind the control panel or hidden on the left side behind the grille, which is very helpful when troubleshooting & testing.

You can usually find helpful exploded view diagrams and order parts by entering your full model number here.

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

Posted on Sep 06, 2008

  • 1 Answer

SOURCE: Microwave stopped working while cooking. Is there a fuse?

If unit is built-in reove screws holding unit to cabinet.
Slide out about 2 inches to access 3 screws holding grill.
Remove grill to get to two screws holding control panel.
Fuse is behind control panel,

Posted on Mar 17, 2009

najah
  • 180 Answers

SOURCE: Microwave has stopped working after being run empty for a short time. Is there a fuse that needs to be replaced or is the microwave dead?

There is a fuse inside the oven. The rating of the fuse may be 8amps. It is not suggested to run the oven without load inside.

Posted on May 04, 2009

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1 Answer

Has stopped working. light gone off at same time. plug fuse has not broke. any ideas ?


There is a fuse inside the microwave also.It is a ceramic fuse,usually 15A.It has to be replaced with another ceramic fuse of the same rating.Bear in mind,the fuse blew for a reason,so if it is the interior fuse replace it after a search for a fault.

Dec 17, 2014 | Microwave Ovens

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The microwave unit in my Thermodore CMT231 has abruptly stopped working. I suspect a fuse may have blown. Is this self-serviceable? I am pretty much a novice.


When you say it stopped working , you mean no lights or display etc. Then that can be a fuse but fuses blow for a reason. Find the reason if the fuse blew.

Oct 14, 2013 | LG LMV1650ST Microwave Oven

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Hi I have a daewoo microwave kor/6n9rr 800watt the upper fuse has blown ,enquired with spares suppliers ,only fuse showing on their parts was one with wire attached each end with terminals which I...


Hello Mary

You shouldn't be working on, or inside a microwave oven. They are not a consumer repair job due to the debilitating effects of microwave energy, the high voltages inside the capacitor, and the highly poisonous core to the magnetron.

Fuses blow for a reason, you have to find the reason before replacing the fuse. Unless you are an electrical engineer, take it to an authorised repair centre, or just buy a new one.

Apr 17, 2017 | Daewoo KOR6N9RR Microwave Oven

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Whirlpool microwave fuse has blown multiple times


It depends on which fuse and when it blows. Wish you had mentioned that.

But usually it's a defective door switch or door switch mount.

If the fuse blows at random times while it's cooking, it may just be a loose fuse holder. Those have to be replaced due to metal fatigue, not just squeezed tight with pliers.

If it blows as soon as you hit "Start" to begin cooking, you have a shorting high voltage capacitor.

If it blows when you open or close the door, you have a loose or defective door switch or latch.

You can find helpful exploded view diagrams and order parts by entering your full model number from the tag on the oven here.

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

Nov 21, 2012 | Microwave Ovens

1 Answer

Whirlpool ukm120 microwave stopped working


1) you use contacts cleaner with very speed dry or isopropyl alochol to 100% for dry the humidity sector inside from microwave.+power cord+main switch. The reason is has humidity. This water or some other liquid are NOT conductors.by that reason isolated. See if some parts are burned or smell strange.
2) test the fuse again. 3) dry the HV transformer and magnetron with infrared LAMPS by 8-10 hours for to dry any humidity.
3) and try again.see the inside of microwave
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Jul 26, 2012 | Microwave Ovens

1 Answer

My Microwave is not working


Without other information, sometimes the fuse blows due to interlock switches. There are usually three or four switches that are activated by the microwave door. If any of the switches are not working properly, the microwave will not turn on.

Dec 30, 2011 | GE Microwave Ovens

1 Answer

GE microwave oven model#JVM1441BH04 when you close door on switch activates and oven comes on. Only goes off when door is opened.


HELLO.

the problem your are experiencing with your microwave oven is a failed interlock switch.
Be careful when closing your microwave door. Slamming the door too hard is one of the main reasons that the interlock switch is damaged.

Slamming the microwave door shut can easily blow the microwave fuse, but they can also blow due to problems with the interlock switches.
A microwave oven will not function until the fuse is replaced.

Instruction on how to replace fuse on microwave.

1. Unplug the microwave from the electrical outlet to prevent electrocution. Place the microwave in a well-lit area to be able to locate the fuse.

2. Use a screwdriver to remove the outer cabinet of the microwave, and follow the power cord to the fuse. The fuse is located 2 to 3 inches within the microwave and is attached to the power board.

3. Observe the fuse to determine if it is blown. Blown glass fuses will produce burn marks on nearby surfaces, or the internal fuse wire will be black and melted, while ceramic fuses show no outward appearance of being blown.

4. Determine if a ceramic fuse is blown by testing it with an ohmmeter. If the ohmmeter reads zero ohms, your fuse is not blown. Other readings on the ohmmeter show that your fuse is blown.

5. Replace the blown fuse by popping it out of its holder, and snapping a new fuse in its place. Tighten the fuse clips by squeezing them together with your fingers.

6. Replace the outer cabinet of the microwave, and plug the microwave back into the electrical outlet. Test the microwave to see if it's working properly.

thanks.

Sep 22, 2011 | GE Spacemaker JVM1640SJ Microwave Oven

1 Answer

Microwave turns on everything works but is not heating up food what can I do, I am a license electrician is there a fuse in side?


Yes if you remove panel you will find a capsule with a ceramic fuse inside so you can check it out.
Many times the fuse blown out from long time use, however if it will blow out you need to check what was the reason for bowing the fuse.

Sep 28, 2010 | GE XL1800 1100 Watts Microwave Oven

1 Answer

Will not heat anything


This is not lock child feature, you reset lock child uunplugging power.

Test the high voltage capacitor, the rectifier diode.or the magnetron. If all this are fine, test the control board.

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

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).

Apr 07, 2009 | Goldstar MV-1501 Microwave Oven

4 Answers

Everything works except the microwave? could it be a fuse


There must be a fuse on the MW control board.

Feb 18, 2009 | Microwave Ovens

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