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Samsung mw4699s fuse replacement

I believe that I have a blown fise on this micro wave. I have not taken it apart yet but was wondering the best way to go about replacing the fuse.

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A microwave can be dead for many reasons.

It may be the fuse, which is usually located behind the grille or on the floor of the oven behind the control panel or between the door switches.

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

The TCOs you need to be concerned usually with have black wires. You can ignore the ones with blue / violet wires in this case.

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.

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.

You should do a continuity test on the fuse while it's in the holder (with the microwave unplugged, of course) then turn the fuse by hand or take it out and put it back in, then test it again.

If you remove the fuse, then press the meter leads against the ends, it can allow internal contact to be made and make a bad fuse appear to be good.

If you or someone you know decide to look into it, we have critical safety information and disassembly information at our site, and our link is at our listing here on FixYa.

You can order Samsung parts here.

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

Posted on Sep 01, 2008

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1 Answer

Where can I get main board diagram with parts list for an unidentified microwave oven?


Hello Danielle Carter,

Fact is... you are not looking for a fuse...

You need t know why that fuse OPERATED (Blow'd)...

Before we start...
An annoying little known trivia about micro-waves...
If used for EMPTY or for softening single pats of butter
they will soon self destruct (eat themselves... burn-out... fail).

When they do... their "micro-wave-generator" (magnetron) will
consume much more energy and cause the primary (most likely solitary fuse to operate)... "blown fuse".

Would that you had included a model number... (but alas)...

Unidentified... indeed!

Looking up your own model number on eBay or better GETTING your REAL PART NUMBER off of your original parts sheet will allow you to shop for the VERY BEST PRICE.

Sears has an excellent reference library... but if you want the same part you can get everywhere else for the HIGHEST price
SEARs ($$$$) is (not) your place...
(3 estimates... always!).


Don't forget to get that SPARE FUSE...!

Happy hunting.

appliancepartspros...
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Mar 31, 2016 | Microwave Ovens

1 Answer

We found model # for Samsung micro wave door will not stay latched tight model # is SMH7174WC/E how do we take door apart? thank you


This service manual should help you.

If you need to order any parts, the best bet is to get the full model number from the tag in or on the unit and call Encompass toll-free at 866-779-5835.

Jan 08, 2013 | Samsung Microwave Ovens

1 Answer

I have samsung microwave model MW830WA 120V 60HZ 800W IT IS DATED 2001. The fuse has been blown off last week. I want to know where the location of the fuse and what fuse to buy. Thank you, Phil


I know on my samsung it's right on top when you take off the outer cover. I also have an emerson and it's on the right side behind the control panel There is a white plastic cover over the fuse that just snaps apart.. I buy my fuses at radio shack. I know mine takes a 20 amp 250 volt.

Aug 12, 2010 | Samsung MW4699S Microwave Oven

1 Answer

Micro wave simply quit. How an I check to see if


The fuse is located inside the microwave. You will need to remove the front panel to get to it. It will be located on the black power wire inside the microwave and installed inline. Make sure that the microwwave is unplugged before removing the front panel. Once you locate the fuse inside you will need to remove it and test it with a continuity tester to see if it is blown. If it is make sure you replace the fuse with the same amp rating you found. If the new fuse blows again then there is an electrical short somewhere inside the microwave.

Dec 24, 2009 | Emerson MW8778 Microwave Oven

1 Answer

Not heating


Remove the outer cover (pull the power plug first) and look for a blown fuse. If found, replace the high voltage diode and the 'stirrer' (a fan-like device located within the sheet metal wave-guide near the opening in the cooking cavity where the microwaves come into it). This stirrer has a plastic bearing that frequently arcs over and permanently shorts out the microwaves which blows the fuse. If no blown fuse is found, look for a loose or defective door-interlock micro-switch.

Nov 17, 2009 | Kenmore 61652 Microwave Oven

1 Answer

Micro wave won't heat


HI. in most cases, this will lead to a failed Heating device(magnetron tube).It would be wise to check the Magnetron cutoff fuse to be sure of its integrity. if the fuse is blown, simply replace it. if the fuse continues to show continuity, replace the magnetron.

(((The fuse is located inside the unit along side the magnetron)))

Sep 20, 2009 | Kenmore 62702 Microwave Oven

1 Answer

Wont turn on


With the info given, I would guess that your fuse is blown. You can taken the cover off and look inside. The fuse looks like one of the old car fuses but it's ceramic. Most likely a 20 amp. Do not try a regular fuse, it has to be a micro wave fuse.
Please rate solution

Sep 02, 2009 | Kenmore Microwave Ovens

1 Answer

Need to set time on microwave


In case it's model MW4699S, you can download the owner's manual here.

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

Feb 08, 2009 | Samsung MW4699S Microwave Oven

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