Question about LG Microwave Ovens

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My Dometic model CDMW12B for my RV was working fine until the campground we were at had a power surge and now it doesn't work. We made sure and plugged it into an outlet in our garage when we got home and still nothing. Could it be a fuse if this model even has a fuse. Or is it now toast. If so can we replace it with say a model from Wal-mart?

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Yes it could... replacement parts can be found on amazon, take a look here: Finally charging for our multi device world. I hope this was helpful. Have a nice day

Posted on Dec 16, 2014

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6ya6ya
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SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

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Posted on Jan 02, 2017

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jsrock516
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SOURCE: MAYTAG mmv4205aab OVER THE RANGE MICROWAVE

It could easily be a bad line fuse and/or line filter. To access you will need to unplug the unit and remove the outside case. Inside the unit, where the A/C power cord comes in, there should be a small circuit card (part #237068) located somewhere with a fuse mounted on it. This is your input line filter board with line fuse. Replace the fuse, first and see if this fixes your problem. This is a 20amp appliance fuse that you can purchase at any hardware store. Make sure you place the cover back on the unit BEFORE you plug it in. It is not safe to have this area of the microwave exposed with power applied. High potentials in the 4,000 volt range are present! If the fuse does not correct your problem, the circuit card runs about $26.00. Good luck and hope this fixes your problem.

Posted on Aug 04, 2007

MicrowaveSvc
  • 9047 Answers

SOURCE: Advantium oven has no power

A microwave can be dead for many reasons.

If it goes dead for a while during or after cooking then comes back on, the magnetron is probably overheating and causing the thermostat to open. When it cools, it closes the circuit and allows power through again.

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

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

If you or a friend decide to look into it, we have critical safety information and disassembly information at our site, linked here on Fixya: http://tinyurl.com/yzjozk

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

Posted on Nov 18, 2007

MicrowaveSvc
  • 9047 Answers

SOURCE: possible power surge?

Sounds like you got a surge which damaged the control panel. This is the most likely thing. We regularly repair these control panels nationwide for $32.50. A fuse is designed protect against excessive current. But if you have excessive voltage (a surge or spike), it can be so fast that it gets past the fuse and damages the control panel without actually blowing it. While the panel does have surge protection to keep that surge from actually destroying the control panel, the panel is damaged and will have to be repaired. If any power line connections were broken or are suspect, I hope you have contacted the power company. Either way, I would test any affected outlets to be sure the neutral and ground are present so the voltage output is within the proper range.

Posted on Nov 16, 2006

MicrowaveSvc
  • 9047 Answers

SOURCE: We had a power surge

We repair these on a regular basis for customers nationwide with our guaranteed $39.95 service with a full one year warranty.

We have full details, plus *critical* safety, disassembly, and troubleshooting info at our site. You'll find a link to our site in our listing here on FixYa: http://tinyurl.com/yzjozk

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

Posted on Feb 28, 2008

  • 105 Answers

SOURCE: NO POWER

Inside the microwave is a fuse. If you can, try plugging the microwave into a different outlet (use an extension cord). If it does not power on, you have likely blow the fuse. If you are technical, you may look into replacing the fuse yourself (you will have to remove some parts of the microwave exterior to get to the fuse). Otherwise, if no longer in warranty, you will need to have a shop or handyman replace fuse.

Posted on Mar 29, 2008

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Dometic CDMW12B RV microwave- runs like its working but doesn't cook. Lights up, table rotates and all the buttons work. Fixable or dead? Thanks, Anne in Michigan


Microwave Ovens are inherently 'unserviceable' in that the radiation from a klystron tube is dangerous unless strict safety protocols are followed by a knowledgeable repair center. It is ionizing radiation. (Cell destroying.)
Unless you paid well over $100.00 US for it, better just junk it as repair costs are probably going to just about be that.
On the up side, failing microwave ovens under extended warranty are usually replaced same week. Check to see if you have one. If you paid with a Credit Card, sometimes the manufacturers warranty period is doubled automatically. Visa used to do that. Not sure if they still do. Ask.

https://www.google.ca/url?sa=t&rct=j&q=&esrc=s&source=web&cd=9&cad=rja&uact=8&ved=0CEUQFjAIahUKEwig6LzgoOPGAhVBOT4KHRsdABw&url=http%3A%2F%2Fwww.electronicstheory.com%2Fhtml%2Fklytheo3.htm&ei=QIepVaDIO8Hy-AGbuoDgAQ&usg=AFQjCNHJ8sg09og_raaF_T3lEUhWw80EmQ&bvm=bv.98197061,d.cWw

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>> We also tried plugging our toaster into the microwave plug outlet, and the toaster wouldn't work in that outlet, but worked just fine in a different outlet in the RV.

This means the outlet you plug your microwave into needs to be fixed in addition to fixing the oven. Breaker? Fuse?

>> I understand from another RV forum that microwave ovens for RVs have "special circuitry and cooling features" not found in regular countertop ovens for household use.

Not really in my experience. Any microwave supplied with clean AC power and proper venting space will be fine.

But I'd bet your microwave can be fixed affordably.

The main internal things which can result in this model being dead (no display, no light when you open the door, no beep when you press a pad on the keypad) would be the 20A fuse and the magnetron temperature fuse. There could also be bad connections on the noise filter board.

Also, sometimes a power surge can cause the power to be interrupted to the low voltage transformer on the board, and I regularly repair those boards. I can also write a technical statement to your insurance company or to an RV park as needed.

At my Web site, I have a video available showing how to remove a typical over the range control panel assembly in under 5 minutes.

The relevant service manuals for this model are here and here.

You can order Sharp parts from Sears or Encompass.

Contact me directly if you need more help.

- William E. Miller, AS-EET
pupista@gmail.com
http://www.MicrowaveControl.com
Microwave Oven Control Panel Repair Nationwide "Recycling by repairing since 1982"

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Please post a new help request here on FixYa and include the full model number from the tag in the cooking cavity or elsewhere on the microwave, such as the door frame, controller frame, etc. and detailed symptoms and when they occur.

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What happens a lot in these RV microwaves is that a surge will damage the circuit board and sometimes also blow the low voltage transformer.

These are problems we can usually take care of for $39.95 and $54.95 respectively.

You can get more information here.

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

We had a power surge in our rv which fried several appliances including Dometic Microwave. Is it repairable? The replacement cost at Camping World is about $600.


We repair these on a regular basis for customers nationwide with our guaranteed $39.95 service with a full one year warranty.

We have full details, plus *critical* safety, disassembly, and troubleshooting info at our site. You'll find a link to our site in our listing here on FixYa: http://tinyurl.com/yzjozk

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

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