Question about Frigidaire Microwave Ovens

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My Frigidaire over the range microwave keeps blowing the fuse when I try to start it?

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  • 8 Answers

It sounds like a dead short somewhere in your wiring. If you've had someone replace a breaker recently they could have used the incorrect amperage size.

Posted on Jan 17, 2019

  • David Mann
    David Mann Jan 17, 2019

    Breaker is good. We did have to replace fuse twice in past 6 months before but now it powers up then blows fuse when we try to use microwave

  • David Mann
    David Mann Jan 17, 2019

    I'm assuming something was going bad causing fuse to blow, and finally gave out.

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6 Suggested Answers

6ya6ya
  • 2 Answers

SOURCE:

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Posted on Jan 02, 2017

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fridgetech
  • 473 Answers

SOURCE: Microwave keeps blowing fuse

If it blows the fuse as soon as you hit the START button, it's almost certainly a shorted high-voltage capacitor.

If it blows a few seconds after you hit the START button, it's probably the high-voltage transformer. You'll possibly also smell a faint electrical burning smell from the rear vent after you shut if off.

If it blows the fuse as soon as it's plugged in, you probably have a shorted door switch, a shorted varistor, or an internally exposed wire shorting to the chassis, etc.

Posted on Nov 19, 2007

MicrowaveSvc
  • 9156 Answers

SOURCE: Microwave keeps blowing fuse

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 with info on part testing:



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




You can usually find helpful exploded view diagrams and order parts by
entering your full model number here: http://tinyurl.com/gv383



Please write back with your brand and model number if you need further help.



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

Posted on Jan 13, 2008

  • 11 Answers

SOURCE: microwave blowing fuses

Sanyo isn't that great of a manufacturer.. I had a microwave from them a few years back that did the same thing.. The wiring inside the microwave is shot.. if you were to open it up, you'd probably see some burnt wires from a short. If you use the microwave over a range, it may be because of grease build-up...

anyhow, its better that you invest in a new microwave, rather than fix it. It will be much more cost efficient

Posted on Jun 02, 2009

wiznet2000
  • 86 Answers

SOURCE: keeps blowing fuses

This problem is just like my own microwave, replace the shorted HV capacitor

Posted on Jul 27, 2009

MicrowaveSvc
  • 9156 Answers

SOURCE: My Frigidaire fmv156dsb microwave counts down and lights work onl

That would be a bad primary interlock (bottom door switch) or its mount may be, loose, cracked, or misaligned.

We have the service / repair manual for this model and have uploaded it to our site here for free download to help you.


It will give you safety info, step by step help in disassembly, troubleshooting tips, and part numbers.

If a switch is all you need, we offer a universal type for only $5 postpaid which you can order here.

Even though a door switch clicks, it may still be bad inside.

Door switch or mount trouble is usually caused by slamming the door or by opening the door while it's cooking without hitting the Stop pad first.

There are plastic mounts inside the microwave which hold the door switches and onto which the door latches lock when you close the door.

The screws on these mounts may be loose. If they get too loose, the switches will not be activated properly.

Sometimes it's a broken tab on the switch holder, allowing the switch to rotate just out of position. This tab can be hard to see, since it is under the bottom edge of the switch.

If the switch mount is broken, it's usually more economical and safer to add a dab or two of hot glue to the mount to secure the switch. Let it cool for about 30 minutes before using.

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

Posted on Aug 09, 2009

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THE MICROWAVE KEEPS BLOWING FUSES, AS SOON AS I HIT THE START BUTTON THE FUSE BLOWS.iT WILL KEEP THE TIME AND THE LIGHT WILL COME ON BUT AS SOON AS i HIT START IT BLOWS


Sorry to read about your problem, I hope this helps you out.

you have a defective control board

I tried to help you. Please help me and Rate/Vote on my response, thanks and good luck

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Frigidaire microwave continues to blow 20 amp located behind the control panel when attempting to heat items


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

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

If it goes dead or blows the breaker (or GFI) when you plug it in or open or close the door, then there's a problem with a door switch or door switch mount.

If it's intermittent or random, it may be a bad connection, usually on the control board or a loose fuse holder, or even an intermittent fuse.

We would need the model number to help you further, but would be happy to give you more DIY tips.

Chances are we can point you to the service manual online.

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

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1 Answer

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Your aren't giving me much to work with but I have fixed a bizillion microwaves and in most cases they blow the fuse (probably 18 amps) and it is because the HV diode shorted. So both would need to be replaced. Not a big expense. I would think about $50 from a reputable company. There are some exceptions of course. If the unit is very old it could have a bad magnetron in which case it is not worth repairing. The unit may only need a fuse. Everytime you hit go the microwave makes a very hard demand on power and over time the fuses can blow. Let's hope for the best a new fuse. Let me know how this works out.

hardrocko

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Microwave blowing fuses


Sanyo isn't that great of a manufacturer.. I had a microwave from them a few years back that did the same thing.. The wiring inside the microwave is shot.. if you were to open it up, you'd probably see some burnt wires from a short. If you use the microwave over a range, it may be because of grease build-up...

anyhow, its better that you invest in a new microwave, rather than fix it. It will be much more cost efficient

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1 Answer

Fuse keeps blowing.


couple questions -
what else is on the circuit,
and what current does the oven need

there are whirlpool over-range models with
1200watts of microwave,
1500watts of convection power, a
60watt bulb and a
375watt fan

over 15amps -20amp circuit needed

if you inadvertantly replaced a higher current fuse with a 15amp fuse, it will blow every time.
the install guide http://www.whirlpool.com/assets/pdfs/product/ZINSTALL/8206589.pdf reccommends 20amp
not a solution, something to check,

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