Question about Sanyo EM-S8000 Microwave Oven

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Fuse Internal fuse burned up. I cannot read and am not sure what size fuse it is.

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  • Mary Jo Richardson Jan 18, 2009

    We had a power outage and my micro hasn't worked since. No light nothing.. Sanyo Em-S8000 above range. Is it toast or do you have a solution.?

  • Mary Jo Richardson Jan 18, 2009

    power surge and nothing works. Sanyo EM-S8000 above range micro. Help

  • Anonymous Mar 12, 2009

    Sanyo EM-S8000 OTR. One of the counter light bulbs on the bottom was burnt out. When I went to take it out the bulb broke off at it's base and at the same time the other light fried too. Now I have replaced both bulbs but now the lights don't work and the exhaust fan does not work but does indicate on the panel. What burnt? An internal fuse easily replaceable or something on the motherboard? Next time I will unplug unit before changing bulbs.



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I'm confused! You say you cannot read? OR, You cannot read the fuse. Remember on fuses, voltage rating is as important as amps. What is the make and model? is there a diagram of the wiring inside? get someone to read the amps (fuse) to you.
Note: Most common is a 15amp (for M/W Oven). Can be purchased at most Hardware Stores.
CAUTION!! Do not over-rate or under-rate the fuse. If it blows with the correct fuse in it Do Not put in a higher amperage fuse!! Can everyone say FIRE!!

Posted on Jan 25, 2008


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1 Answer

There is no power to the microwave model #mco160ub. Is there a fuse I can check?

Katherine, there is an internal fuse on microwaves. First, make sure you un-plug the microwave and then you will need to take the cover off of the unit. You will find screws on the back and sometimes the sides that hold the cover on. Once you have the cover off, look for where the power cord goes into the machine. There will be three wires coming out of the power cord, one black, one white, and one green. Follow the black wire and it will usually take you right to the fuse in a holder, or to a circuit where the fuse will be located. You will need to look at the end of the fuse to see what amperage fuse you will need. Most microwaves use either a 15 or a 20 amp fuse. Make sure you replace with the identical size fuse. If it blows again right away, that means you have further problems and should have it looked at by a regular repairman. Hope this helps!

Jan 25, 2015 | Magic Chef Microwave Ovens

1 Answer

Oster microwave model ogf41101 all works but dont

you can use a 250vac 20 A ceramic fuse but the right size is engraved in one end of the fuse any radio shack or electronic store will have it make sure it is disconnected.

Aug 29, 2014 | Microwave Ovens

1 Answer

Interior light bulb burned out previously; now no power at all.

I have had to change the fuse in a handful of my microwaves,usually when they get to be about 10 years old.If you take the housing off,you should find an inline fuse holder on the power cord just as it enters the housing.Read the info on the fuse,and replace it with the same size/type(the ones I've seen are ceramic fast acting fuses)I also like to take another spare and tape it inside the housing near the fuse holder so I don't lose the spare.

Jan 01, 2012 | Magic Chef Jade Microwave Ovens

1 Answer

The power in our MV1608WW by gold star (LG) just cut out. how do we replace the internal power supply?

Most microwave ovens have a fuse. It may be a cartridge-type. You will need to remove the fuse from its socket and use an ohmmeter to check fuse continuity (that current can pass through it). If the reading is very high (kilo-ohms or mega-ohms), the fuse has blown and will need to be replaced.

Be SURE the microwave is unplugged before doing any testing!!!

Mar 13, 2011 | Microwave Ovens

2 Answers

It will run but it won't heat. It also makes a funny "humming" sound and smells like burning plastic.

Sorry to read about your problem, I hope this helps you out.
you may one of these issues.
  1. Blown fuse in HV transformer primary circuit or HV fuse (if used).
  2. Bad connections (particularly to magnetron filament).
  3. Open thermal protector or thermal fuse.
  4. Open HV capacitor, HV diode, HV transformer, or magnetron filament.
  5. Shorted HV diode, HV capacitor (will blow a fuse), or magnetron.
  6. Damaged protective VDR from filament to chassis (not commonly used).
  7. Defective HV relay (not commonly used).
Microwaves must be serviced by technicians due to the inherent dangers involved in repairing these appliances. Internal capacitors can retain a lethal electrical charge even though the unit is completely unplugged. A microwave radiation leakage test must be performed on the unit following any internal component repair.

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Jan 04, 2011 | Maytag MMV5156AAS Microwave Oven

1 Answer

Have a Kenmore 721.67680790 lost all power is there a fuse somewhere?

Microwave ovens have both electrical and thermal fuses. The former are usually cylindrical (1/4" x 1 1/4" or 5 mm x 20 mm) and mounted in a clip-type holder. The latter are either rectangular ceramic blocks about the same size as an electrical fuse, or metal and plastic cans about 9/16" in diameter with blade-type electrical terminals on top and a diamond-shaped metal mounting plate on the bottom. They are usually mounted on or near the magnetron or on top of the oven cavity.

Electrical fuse
Do not test by replacement; use an ohmmeter or continuity tester to check the fuse.

If the electrical fuse is blown, check the high-voltage capacitor behind the big transformer for a short circuit. Caution: discharge it through a large resistor before touching the terminals with your fingers or an instrument other than a high-voltage probe. If you see a spark when you touch the discharge lead to the capacitor, you can stop that test; the capacitor is NOT shorted, although it's internal safety discharge resistor may be open. If you don't see a spark, set your digital multimeter to its highest DC voltage range and confirm that the capacitor is discharge, then set it to resistance to check for a short. A good capacitor will have a constantly increasing resistance reading until it finally settles on a number above 1 million ohms (internal discharge resistor); a bad one will quickly settle on a very low value. (A continuity tester may give a brief indication of continuity as the capacitor starts to charge, then show "open".)

Inspect the door switches to make sure they aren't broken or burned. I've seen them literally fall apart - the contacts start going bad, get hot, deteriorate further and eventually cause the plastic case of the switch to fail. Usually you have trouble getting the oven to work properly when this happens, but it's possible the first sign of failure is a short to ground from a terminal that fell off the switch, and a blown fuse. Inspect the rest of the wiring for anomalies as well. If you can't find any shorts to ground or across the power line (don't be fooled by the low resistance of the controller transformer), then you can try replacing the fuse.

Thermal fuse
Again, use an ohmmeter or continuity tester to check these. Thermal fuses can go out simply because the oven got over-worked in a hot environment, especially if the cooling vents were blocked or the fan is not turning fast enough. Clean the vents and magnetron fins if necessary, and make sure the fan spins freely and easily.

Dec 06, 2010 | Kenmore Microwave Ovens

1 Answer

No power at all. Outlet is fine. Is there an internal fuse?

Yes there is most of the time. A new fuse can be obtained from radio shack. Most ovens use a small ceramic cartridge fuse ABC 15 or ABC 20. Please note though that this fuse usually blows because one of the small microswitches in the door circuit is bad (overheated and is burning up inside) or has operated out of sequence with the other several switches. Newer microwaves have one big switch assembly that needs to be replaced when the fuse blows. Make sure the door fully closes when replacing a switch. Be very careful with microwaves. There is very high voltage inside that could severely shock you!

Jun 23, 2010 | Magic MCB770W 700 Watts Microwave Oven

1 Answer

SIZE OF INTERNAL FUSE A Belling BEL-CJ/SS25 Combination microwave oven The fuse has blown and the size printed on end cap unreadable any one any idea as to its value as it reads like T8H250V

Check to see if its marked on the panel itself could be an 8 amp 1.1/4 inch size must fit the correct amp fuse for safety also be careful as the Capacitor may hold a charge and can be lethal voltages within...good luck.

Apr 12, 2010 | Microwave Ovens

1 Answer

The under unit light burned out and tripped the circuit breaker. Replaced bulb and reset breaker but light doesn't work. I see there is an internal fuse. Could this be the problem as there is no power...

These remarks are not make and model specific.

Did you test the new light bulb?

I would not normally expect a burned out light to trip a breaker.

You may have a blown fuse. I suspect the fuse you see is to protect the oven. If you popped a breaker, you may have blown a fuse. I'd be looking for a short somewhere, maybe in the wire that powers the light, maybe in the hardwire that supplies the oven.

Make sure you turn the power off before you go poking around. And, above all, avoid the silver can inside, it IS lethal.

Let me know if this helps.


Sep 21, 2009 | Maytag MMV1153A Microwave Oven

1 Answer

Maytag Microwave dead

Check the internal fuse. Unplug it, unscrew and take off the cover, the fuse should be easily found in the back by the power cord. It looks like a regular fuse but is white instead of clear glass because microwave fuses are special. You'll have to measure it with a meter as a result and be sure to replace it with the same kind. (try finding them at radio shack) Hopefully there isn't something more serious also.
Hope ya fix it!

Jan 30, 2008 | Maytag MMV1153A Microwave Oven

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