Question about Emerson MW8778 Microwave Oven

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Emerson MW8778W Microwave works but the table won't spin to heat the item evenly

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6 Suggested Answers

6ya6ya
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Posted on Jan 02, 2017

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MicrowaveSvc
  • 9085 Answers

SOURCE: Microwave works intermittently

This is most commonly due to a failing door switch or door switch mount. But it may also be a bad connection or bad relay on the control board, which we repair nationwide for $39.95. Also, it could be a loose connection at the magnetron. If you or a friend decide to work on it, 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 for similar models here: http://tinyurl.com/gv383 You can order parts at http://www.wehaveparts.com

Posted on May 22, 2007

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freetek
  • 5568 Answers

SOURCE: How can I find out what wattage my Emerson MW8778W microwave is?

I also bombed out on locating a downloadable manual but the hardcopy is available on eBay here:

http://cgi.ebay.ca/Emerson-Microwave-Oven-MW8778W-S-D-B-Owners-Manual-7_W0QQitemZ320281595945QQihZ011QQcategoryZ159903QQrdZ1QQssPageNameZWD1VQQcmdZViewItem

The efficiency of microwave oven is ~ 65% so if you will check the back of your unit for the AC line (input power) consumed, you can easily calculate the usable 'cooking' power available.

i.e. If the label states: 115 VAC 10 Amp(eres), this would amount to 10 X 115 = 1150 X .65 = ~ 740 watts delivered to the food.

The magnetrons do age (if not fail first) and their emissions fall with progressive use so a 10 year-old oven won't still give you that ~65% but substantially less.

Posted on Sep 05, 2008

  • 2 Answers

SOURCE: Emerson Microwave (mw8992rd) not heating up

I have replaced the main fuse on this model. Though blown main fuses are common in this model, it will not even turn on when they blow, so your problem is most likely NOT a blown fuse. I had heard of your problem so, when replacing the main fuse inside one, I looked for additional fuses and saw none. The store was wrong. Even if it were a fuse, the security Torx screws mean that you couldn't replace the fuse anyway.

This microwave seems to have been haphazarly been recommended by Consumer Reports, but it is terribly unreliable. The turntables break when popping popcorn, the main fuse repeatedly blows, and they also stop heating.

Posted on Feb 23, 2009

MNfisherman
  • 11896 Answers

SOURCE: Need a new plate for Emerson MW8778W Microwave

either ebay or www.repairclinic.com and lastly appliancepros.com

Posted on Sep 09, 2009

rhozel2010
  • 269 Answers

SOURCE: Emerson MW9111 will not heat- all timers & clock work

Hi! try checking the fuse that goes to the magnetron.

Posted on Sep 12, 2009

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1 Answer

My microwave won't heat


The real clue here is strangely enough the table not turning.

All units have a switch in the side (usually the right side) of the cabinet--when door is opened it allows the unit to work but will not heat or the table (usually both) will not work.

It has to be got at from the inside of the unit--little plastic holder with the switch which looks like a leaf switch.

What I have seen several times (including a unit I own) is that from countless opening and closing the door the holder may break or even melt and the contacts on the switch no longer are in position to work when door is open.

The purpose of such a switch is simple---it prevents the unit from being used if the door is OPEN.

Not a hard or expensive repair

Dec 06, 2012 | GE Profile Spacemaker XL 1800 36"...

1 Answer

My emerson 899rd dosnt heat up food


It's probably a failed magnetron or loose connection at the "FA" terminal of the magnetron.

Nov 27, 2012 | Emerson Mw8999rd Microwave Oven

1 Answer

Emerson microwave MW8103SS not heating up.


If the turntable in not turning, it's probably be a bad door switch or door switch mount.

See these links:

http://031d26d.namesecurehost.com/mwd/safety.txt http://031d26d.namesecurehost.com/mwd/disassembly.txt
http://031d26d.namesecurehost.com/mwd/doorsw.txt


If the turntable does turn, then it is probably a bad connection or component in the high voltage section.

You can find links to helpful exploded view diagrams and part ordering help here.

I recommend that you bookmark that link to your favorites.

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

Oct 24, 2012 | Emerson Microwave Ovens

1 Answer

How do I set power settings on Emerson model MW8778W?


read your instru manual download from www.fitness.manualsonline.com or www. retrevo.com and proceed accoridng.
God bless you

Jul 16, 2012 | Emerson Microwave Ovens

1 Answer

My emerson microwave turns on but it won't cook or


Check to see if it has a DEFROST SETTING if Defrost setting is on it will not reach an adequate temperature

Jun 07, 2012 | Emerson Microwave Ovens

1 Answer

When I press the start the button the turn table inside microwave is not turning and there is not heat on the food. But the light is on and the clock is working. What do you think is the problem? and what...


The turn table motor of your microwave is defective already and also the magnetron - the source of generated heat of the microwave is also defective. But before assuming that magnetron is dead, check the high voltage fuse it may be blown and replace the fuse (if it is blown) it with similar rating. I hope I help you with your microwave problem.

Mar 21, 2011 | Emerson MW8107WA Microwave Oven

1 Answer

Need a manual for emerson mw8778w - ? pdf


I have a manual scanned into my computer but cannot figure out how to post it online. Help?

Nov 20, 2010 | Emerson MW8778 Microwave Oven

1 Answer

I need a Owner's guide book for this Emerson Microve MW8778W SERIAL NO,90804465K6. Thank you


Many Emerson microwave owner's manuals are available for free download here.

Even though yours may not be there, there might be one close enough to help you.

For more help from Emerson
visit here or get help using your appliance at 1-800-898-9020.

Get help locating an authorized servicer or parts at 1-800-695-0098.


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

Oct 05, 2009 | Emerson Microwave Ovens

1 Answer

Need a new plate for Emerson MW8778W Microwave


either ebay or www.repairclinic.com and lastly appliancepros.com

Sep 09, 2009 | Emerson MW8778 Microwave Oven

1 Answer

How can I find out what wattage my Emerson MW8778W microwave is?


I also bombed out on locating a downloadable manual but the hardcopy is available on eBay here:

http://cgi.ebay.ca/Emerson-Microwave-Oven-MW8778W-S-D-B-Owners-Manual-7_W0QQitemZ320281595945QQihZ011QQcategoryZ159903QQrdZ1QQssPageNameZWD1VQQcmdZViewItem

The efficiency of microwave oven is ~ 65% so if you will check the back of your unit for the AC line (input power) consumed, you can easily calculate the usable 'cooking' power available.

i.e. If the label states: 115 VAC 10 Amp(eres), this would amount to 10 X 115 = 1150 X .65 = ~ 740 watts delivered to the food.

The magnetrons do age (if not fail first) and their emissions fall with progressive use so a 10 year-old oven won't still give you that ~65% but substantially less.

Sep 05, 2008 | Emerson MW8168B Microwave Oven

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