Question about DeLonghi MW 605 Convection/Microwave Oven

2 Answers

Fuse is always blown

Have a good day Sir, I have a DeLonghi Microwave model MW605. Right now it does not work, it always blown up the fuse. I inspect high voltage Capacitor, it is good. I check the high voltage diode, it is also good. Only the resistor across the terminals of the capacitor it shows infinitive when measured by Megohm. Does it cause the fuse blown up?. I saw it said in Capacitor label, the resistor is 10 Megaohm? I also measured the Magnetron between the two terminals, it is 0.5 Ohm and terminals to body is infinity. Appreciate much if you can give me some hint to repair my microwave. Thank you Thanh_Dang_Xuan@yahoo.com

Posted by on

  • 1 more comment 
  • Thanh Dang May 09, 2007

    Thank you very much for your suggestion. I will check the transformer, because the fuse blow after few second (may be ten second) and I saw the fuse become red, immediately I press the stop button, then I save the fuse.
    Do you have any hint for me to check the transformer? primary coil or secondary coil?. I think you are really a very good expert. Awaiting for your advise.

  • Thanh Dang May 10, 2007

    Dear sir,
    I followed your comment/instruction to check the transformer and following is the result:
    - High voltage terminal to chassis: 112 Ohm
    - Primary terminals: 1.9 Ohm
    - Primary terminal to chassis: infinitive
    - Between Filement terminals: 0.2 Ohm
    - Filement to chassis: infinity
    I also measured Magnetron terminals: 0.2 Ohm and Filement terminals to chassis is infinity.
    Could you pls. advise what component (transformer or Magnetron) is failed?
    Thank you very much for your help.
    Your sincerely

  • Thanh Dang May 10, 2007

    Dear sir,
    I followed your comment/instruction to check the transformer and following is the result:
    - High voltage terminal to chassis: 112 Ohm
    - Primary terminals: 1.9 Ohm
    - Primary terminal to chassis: infinitive
    - Between Filement terminals: 0.2 Ohm
    - Filement to chassis: infinity
    I also measured Magnetron terminals: 0.2 Ohm and Filement terminals to chassis is infinity.
    Could you pls. advise what component (transformer or Magnetron) is failed?
    Thank you very much for your help.
    Your sincerely

×

Ad

2 Answers

Thank you very much for your hint. I changed the transformer and it works now. I feel happy when the problem solved by my hand with your great help. You are really very good expert in both theory and practice. Best regards, Cuoitoet

Posted on May 12, 2007

Ad
  • Level 3:

    An expert who has achieved level 3 by getting 1000 points

    Superstar:

    An expert that got 20 achievements.

    All-Star:

    An expert that got 10 achievements.

    MVP:

    An expert that got 5 achievements.

  • DeLonghi Master
  • 9,098 Answers

When does the fuse blow? If it blows the fuse as soon as you hit START, you probably have a high voltage capacitor shorting. Does it blow a few seconds after you press START? If so, then it may be a bad high voltage transformer. Does it blow when you open or close the door? If so, it may be a bad door swithc or a misaligned or damaged door or door switch mount. Please give more details.

Posted on May 08, 2007

  • William Miller
    William Miller May 09, 2007

    For more information on safely checking the high voltage transformer, see:http://www.gallawa.com/microtech/xformer...

    If you need further help, see this:http://www.gallawa.com/microtech/how_wor...

    This is how a microwave oven works. A detailed, illustrated explanation.

    Thanks for your kind ratings!

  • William Miller
    William Miller May 10, 2007

    Please be aware that the voltages present in the microwave can be instantly lethal!

    You must avoid contact with and wires or components while the unit is plugged in.

    Also, the capacitor can store a charge that can possibly cause injury after the unit has been unplugged.

    The transformer measurements sound good, but it could still be bad. The windings could be heating up and shorting once energized.

    You can unplug the microwave, disconnect the high voltage output lead from the transformer, tape it lightly to prevent any shorting, and run the microwave.

    If it blows the fuse, it's not the transformer.

    Then you'd need to unplug the oven, plug the high voltage lead back in, then disconnect one high voltage item, test the unit, etc.

    At this point it's hard to say without such testing, but I would suspect the transformer.

×

Ad

1 Suggested Answer

6ya6ya
  • 2 Answers

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

Hi there,
Save hours of searching online or wasting money on unnecessary repairs by talking to a 6YA Expert who can help you resolve this issue over the phone in a minute or two.

Best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.

Here's a link to this great service

Good luck!

Posted on Jan 02, 2017

Add Your Answer

Uploading: 0%

my-video-file.mp4

Complete. Click "Add" to insert your video. Add

×

Loading...
Loading...

Related Questions:

1 Answer

My Intellichef microwave model #K0936 has stopped working. I've tried different outlets but the microwave is not responding. Is there an internal fuse that has blown or is the microwave dead?


If the fuse is blown the microwave will be "dead". The fuse is accessed by removing the cover. You can usually find the fuse by following the power cord into the microwave. Unplug the microwave and don't touch anything except the fuse as the capacitor can hold an electrical charge.

Nov 02, 2017 | Microwave Ovens

1 Answer

I used my sharp R-1821 convection microwave that night it did not work. outlet is lit up but display does not come on. Why?


More than likely it will be one of the three door switches. Also check the internal fuse in the unit. The fuse if blown is just a symptom, not the problem. It doesn't always blow out but the right combination of switches bad will take it out.

Dec 03, 2014 | Sharp Microwave Ovens

1 Answer

The fuse always blowning, i do not know what is


There is a short inside the microwave. Must be repaired or replaced!
Make sure there is no metal inside it!!!

Sep 04, 2013 | DeLonghi MW 535 Microwave Oven

1 Answer

My microwave just stopped working. No problems until now. In the middle of cooking it just stopped. No display, no beeps, no bouttons working, no light inside. There is power to the outlet I can plug in...


for the microwave to stop suddenly it has blown its internal fuse this is located under the top panel of the unit it should be white with two silver tips ( ceramic fuse) in some cases the fuse will blow for no good reason on the other hand it can be a serious fault the fastest way to check this is to replace the fuse and re test the unit if the fuse blows instantly then bin the microwave if not it the fuse may have simply failed


best of luck always remember unplug the unit first and always replace with same size and and current fuse

please rank this advice if it helped you

Dec 28, 2010 | Kenmore 80402 Microwave Oven

1 Answer

My delonghi microwave mm821aan-x2 is not heating. the turnstable is working and the light too....is it a part i need to make it work?


Could be several things. Fuse blown to the magnetron circuit. Bad magnetron or fuse and HV diode blown to magnetron circuit. The fuses are only about $5 at www.mcmelectronic.com . If the unit is extremely old the magnetron could be bad but generally it is the fuse and HV diode. For the cost of the parts it would certainly be worth fixing if you have the ability. Let me know how it works out.

hardrocko

Feb 10, 2010 | DeLonghi Microwave Ovens

1 Answer

Microwave not working


Magnetron may have died or internal fuse may have blown.Its could be all sorts of things.
May be time to buy a new one!

DO NOT TAKE OFF THE COVER YOUR SELVES, AS THEY MAY BE ELETRIC CHARGE STILL PRESANT EVEN WITH THE PLUG DISSCONNECTED

Sep 18, 2009 | DeLonghi MW 535 Microwave Oven

1 Answer

My maytag microwave lost power


There is always a fuse inside a microwave.Sometime this has only blown due to a surge,and upon replacing, the microwave will continue working.If it is something worse the fuse will continue to blow.In this case it could very well be the transformer,but there are other possible causes as well.(for example the control board or a short.)

Jun 24, 2009 | Maytag MMV1153A Microwave Oven

1 Answer

Unit dead Unit is dead - suspect blown fuse


Usually, when your microwave oven doesn't work it all, the internal fuse (thermal fuse) is blown. This fuse protects both you and the oven. When it blows, you need to have a qualified appliance repair technician replace it.

The reason for this is that if you do not have any experience and training with microwaves, you can get a SEVERE shock, even if the oven is unplugged. THAT being said, if you still want to know where the fuse is get back to me. good luck.

ALSO, as you may know, a small microwave these days is under fifty bucks at walmart.

May 20, 2009 | Sharp R-1880LS 850 Watts Microwave Oven

2 Answers

Microwave stopped working while cooking. Is there a fuse?


If unit is built-in reove screws holding unit to cabinet.
Slide out about 2 inches to access 3 screws holding grill.
Remove grill to get to two screws holding control panel.
Fuse is behind control panel,

Jan 16, 2009 | Panasonic NN-H264 Microwave Oven

2 Answers

Danby 1000 Watt Microwave is completely dead. Just stopped working right after heating up a dinner.


you may have just blown a fuse inside the microwave or the transformer inside has now failed and will need replacing but it will need to be looked at to see what exactly happened

electech

Nov 27, 2008 | Microwave Ovens

Not finding what you are looking for?
DeLonghi MW 605 Convection/Microwave Oven Logo

366 people viewed this question

Ask a Question

Usually answered in minutes!

Top DeLonghi Microwave Ovens Experts

William Miller
William Miller

Level 3 Expert

9098 Answers

Donald DCruz
Donald DCruz

Level 3 Expert

17130 Answers

Steve Mason

Level 2 Expert

305 Answers

Are you a DeLonghi Microwave Oven Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides

Loading...