Question about Kenmore 63652 Microwave Oven

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Model 721.63652300 no power goes to unit. I checked outlet there is power there. I don't know were to look for blown fuse in unit

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  • rjhellman2 Dec 20, 2008

    I have the same problem and replaced the fuse. The light came on the microwave. I closed the door and set the cooking time and temperature. Then the oven started and ran for about a second and then it died. I think something is blowing the fuse, perhaps the door switches or monitoring switch, but I cannot find the replacment parts online? Are these what I need, and if so, where can I get them?

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Hi

You can remove the grill on top; there should be screws on the top of the microwave and/or within the grill itself. Then remove the control panel, should be one screw on the top of the panel, then lift up on the panel and tilt it out. The fuses should be visible from there. If the fuse is the problem it's easy to change, just remember to unplug the unit first before working on it. And I would suggest getting a single outlet surge protector for the unit; microwaves are very sensitive to power spikes. Please contact me if you need any more help.

Posted on Mar 24, 2008

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MicrowaveSvc
  • 8820 Answers

SOURCE: unit not powering up

There is a fuse located behind the control panel.

 

If that is good, or replacing it does not fix it, you may have a problem with the control panel, which we repair nationwide for $39.95.

 

We have *critical* safety, disassembly, and troubleshooting info (as well as a text file which helps in diagnosing and repairing door switch problems) at our site, which is linked at our listing here on FixYa: http://tinyurl.com/yzjozk

 

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

Posted on Oct 12, 2007

MicrowaveSvc
  • 8820 Answers

SOURCE: kenmore microwave #721-89941-1490

There is an internal fuse, plus one or two thermostats or thermal cutouts.

You can probably find an exploded view by entering your FULL model number here: http://www.searspartsdirect.com

There may also 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.

If the fuse is good, it may be an open thermostat or thermal cutout (TCO) / thermal fuse on or near the magnetron or on top of the cavity / body of the oven.

If it goes dead for a while during or after cooking then comes back on, the magnetron is probably overheating and causing the magnetron thermostat to open.

Then when it cools, it closes the circuit and allows power through again.

When checking thermostats, if it has a hood fan thermostat, that should read open, as opposed to the others, which should read closed.

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

Posted on Jun 29, 2008

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I have a Sharp Carousel model R-1874-T. It suddenly stopped working. No lights are on. I checked the outlet and there is power coming there. Is there a way to reset the microwave?


Steve,
You probably have a blown fuse.

Unplug your microwave and turn it around and remove the screws holding cover on and then remove the cover. Look for where the power cord goes into the back of the unit and follow the black wire from the cord to where it ends. It should stop an either a circuit board or a fuse holder. Make sure that you replace the fuse with the same amperage fuse as what you take out. You will find the amp rating stamped on one of the silver collars on each end of the fuse. Good luck!

Mar 27, 2015 | Sharp Microwave Ovens

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My Panasonic genius sensor 1250W microwave has stop working, now is their fuses i need to check,or is their a way i can, check the heating element to see if i us out.


Kevin,
There is a fuse in a microwave. One way you can tell for sure if the fuse has blown is that there will be no lights or any activity when you push buttons. The screen will not light up either. If that is your case, then you can be fairly certain that your fuse has blown. I would suggest before working on it that you plug something else into the same outlet and see if it works okay so that you can eliminate that you lost power in your outlet. If all of that is okay, then turn your microwave around so that you are looking at the back and take out the screws that hold the cover on. Remove the cover and look at where the power cord goes into the back of the unit. Find the black wire from the power cord and follow it to either an inline fuse holder, or a fuse block, or a circuit board. Depending on your model, you should have one of these three options. Make sure that you replace your fuse with the same amperage fuse that you take out. Look on the metal rings at each end of the fuse and that will tell you what amp fuse you need. Hope tis helps!

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Quit working


1st try plugging it into a different outlet to make sure the problem is not in the outlet. Then if it still has no power, you should open the unit and follow the power cord to the transformer area. Many microwave ovens have a fuse somewhere near the transformer, but some do not. You didn't say what model or brand you have, so I can't say if yours has a fuse or not. Therefore, you just have to check and see. If it has a fuse and it's blown, repalce it. If it doesn't, you could use a volt meter to see if you have voltage going in or coming out of the transformer...CAUTION: If you are sure how to use a volt meter correctly, only check for a blown fuse and leave the rest alone.. wouldn't want you to get electricuted.

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1 Answer

GE microwave over the range, model #jvm1740sm1ss has no power.it's only two year old.what could be the cause?


Hello,

the problem of this unit is power related.

First, remove the unit's power cord from the wall, wait for about 30mins, then plug it back in. It may cool by then and might power on. If it doesn't power on, plug it into another outlet, to make sure there electricity entering into the unit.

If plugging into another power outlet doesn't power it on then the unit is most likely having a power problem.

When electric current comes from the power outlet into the cooker, it goes straight into the power supply board which then circulates the current into the unit. So if the cooker doesn't power on, the first thing is to make sure there is power entering into the machine.

So check the power cord, if it is a 3-pin plug, it must have a fuse in it. check the fuse if it is not blown. if fuse is intact, then power supply board should be checked.

If any machine or electronics device doesn't power on, it means its having a power problem. it might have worked fine in the past, but that's electronics for you. Power surge, irregular power supply, excess power supply, etc can affect the unit thereby not making it to power on.

This unit must have a power supply board in it where power enters from the mains. A capacitor, fuse, diode, etc may have been defective on the power board and maybe that's why its not making the unit turn on. There might also be some disconnection or something, inside the unit which is not making it to power on.

To actually find out what's wrong, you need to disassemble the unit with a screw driver and check what's wrong. You will be needing a meter and continuity tester in order to read the components on the power board, once you detect any bad component, you can make necessary replacement at any electronics accessories store withing our vicinity. This is the only way by which you can detect the problem.

Of course, testing the power board with a meter will require someone that has the ability. So it you can't, then you might be needing the help of a repairman or you can call a friend that has the ability to help you out.

I wish you the best of luck.

Regards.

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2 Answers

I have no power for my GE profile microwave. The model # is PEM31SM3SS. The outlet is good.


Dead appliance, power on wall outlet.

YOUR SAFETY IS PARAMOUNT!

Attempt this only if you are competent.

If your appliance has absolutely no functions at all, remove it from the mains supply, remove the case and see where the mains lead goes in to the appliance and follow the cable until you find the main fuse.
ONLY USE THE SAME TYPE AND RATING OF FUSE TO REPLACE IT.
The usual cause of this fuse failure is the door switches are contaminated or sticking. Check the door switches before putting power back on to the appliance.
Hope this helps.

Jan 24, 2011 | GE Microwave Ovens

1 Answer

Microwave is totaly dead


YOU WANT TO CHECK POWER FIRT AT THE OUTLET MAKE SURE YOU STILL HAVE 120 VOLTS THERE.. IF SO AND PLUG IS GOOD ON 98% OF THE MICROWAVES OUT THERE IS A 20 AMP fuse located in control panel of unit... check there with the power disconnected and may have a blown fuse...if that is good you most likely have a blown control on unit ...
hopw this helps good luck...

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1 Answer

Whole unit will not show power... OUtlet shows power so unit has power... Are there any fuses in the unit? Would they power down the whole unit if they were blown?


Ok....first you don't have a model or make, but yes there should be use, sometimes replacable, inside, if it blows because purhaps the unit was ran empty, it would power off the whole unit, i had a unit that would shut itself off during cooking, and never come back on for days, this was a problem witht the power supply of the circuit board, if you have no worries, purhaps bang on the side, with out denting it, and see if it comes back on, if it does don t use it.

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1 Answer

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  • Make sure that the microwave is plugged into a grounded outlet. It must be a 3-prong outlet.
  • Make sure the clock is set.
  • Check to see if a programming sequence was entered. Sometimes improper programming or a program sequence such as delay start can cause the touch panel to be non-responsive. Unplug microwave or turn off house circuit breaker for 30 seconds. Plug back in, or reset circuit breaker, and try reprogramming unit.
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HOW TO REPLACE BLOWN FUSE


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Kenmore elite microwave


Does the digital display light up at all? Is it completely dead? Are you sure it has power? Have you tried another outlet? If the outlet is good and the unit is completely dead, the internal fuse may have blown. You can try to take the cover off (with the unit unplugged) and look for a blown fuse. Try replacing the fuse with an EXACT fuse of the same rating. Try plugging the unit back in again and see if the unit comes back on. If not, you may have a power supply issue or defective Magnetron.

Please let me know what you find and we'll go from there.

Good Luck,
- Jim

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