Roper Microwave Ovens - Recent Questions, Troubleshooting & Support

* Call for service! High voltage(s) present! *** The following is for information only. *** * Remove oven and unplug. (Yes, you could trip out the breaker. But do you know enough to turn off the right one? Remember, you will be sticking something is a live socket.) * Following is very dangerous! Use the back end of a rubber handled screw driver. Wear a glove and don't touch the metal parts of the oven with your other hand. Use dry towels if needed, to place around the oven door if you have to lean in. Remove all metal shelves. A small wooden handle (from a plumber's helper) can also substitute as well (if it's dry!) * I'm guessing the bulb cracked or broke off the metal screw In base. With power OFF (you will be smashing the wires to the bulb that will probably short out.) Insert the blunt end (Handle side) into the light socket. Use a smaller handle if it does not fit. A broom handle should fit perfect. Press hard enough to get a grip and twist counter-clockwise to loosen the base. You may need to twist slowly back and forth to get the handle to 'bite' into the base. Be careful as the base comes out that you use a gloved hand to unscrew the base the rest of the way. * This method works most of the time. Though it will not work on shorted/melted bulbs. This is caused by a bulb that was not seated properly and 'arced' welded the base to the contacts of the socket. This requires a complete replacement of socket and bulb. * Final; Check your warranty as working on the oven may void it. Warranty periods may last years, so check first. Be safe and call your vendor for service. Aloha, ukeboy57 PS; Though I don't think they use LEDs lamps INSIDE the oven as the heat will destroy them. But if it is an LED lamp then this method will not work. Call for service and replacement.

After removing the cover (most microwaves use security screws) the fuse will be on the circuit board near where the power cord connects. It will look like a glass fuse but is made of ceramic. Most have pigtail leads and are soldered directly to the board. Do not ever operate a microwave with the cover off.

That I would leave up to the professionals. If you are geting moisture or debris inside the glass then it is malfunctioning and needs professional repair. Call the service phone number locatedin the manual or in back of unit. These emit dangerouse uv rays that can harm you if leaking at the door. Never operate if you suspect it is not sealing properly.

If there is a grill above the door, remove it. There will be two long screws that attach the unit to a metal plate. The metal plate is bolted to the wall. Once you loosen the long screws, the unit will tilt down and come off the wall.

CHECK THE FAN AND OUT LE T VENTILATION GOOD OR BAD

PCB transformer faulty

your micro has a short could be a couple things get someone to look at it dont cause a fire

First of all, thank you very much for choosing FIXYA today for your online technical support needs. I'm Joe, and I will be more than happy to assist you with your service request. Here is a direct link to the ONLINE SERVICE MANUAL for that model:https://secured.whirlpool.com/Service/SrvTechAdm.nsf/2cd44500d572193285256a45004fd9d6/4509651d186ee04885256aa100617fb7/$FILE/8178053.pdfAnd here is a link to an exploded view parts diagram of that model:http://www.appliancefactoryparts.com/content/pdfs/128680-8.pdfAnd here is a link to the information sheet on the fuse for that microwave:http://www.appliancefactoryparts.com/search/part/329968/128680 To view the Manual and other information just use your mouse to click on the links, which are the underlined and blue highlighted section of text just above. This will open a new web browser page automatically for you and allow you to view the information at the website indicated and the contents of the Manual.See page 28 (Section 3-8) of the service manual for detailed instructions and illustrations about how to access and replace the fuse on that unit. Please make sure that the unit is unplugged before attempting any repair procedures. These appliances can be very dangerous to work on even after they are unplugged due to the high voltage components inside like the large capacitor. Please do not attempt any disassembly or repairs unless you are very familiar with the electrical saftey precautions necessary. You may need ADOBE READER installed on your computer to read PDF documents, although many computers already have this utility pre-installed. You can always download this for free at WWW.ADOBE.COM if necessary. Click on the DOWNLOAD ADOBE READER button on right side of the ADOBE home page when you get there, then follow the onscreen instructions to install the software on your computer. Please COMMENT back here to this page if you have any details to add, have any questions, have difficulty accessing the links, or just require further general assistance and I will respond as soon as I see it. If you were satisfied with the service provided, could you please take a moment to leave a 5 STAR rating. Your feedback is very important and I truly appreciate your consideration. BEFORE leaving a rating OTHER THAN 5 STARS or a negative TESTIMONIAL, please contact me using the ADD A COMMENT feature and I will immediately clear up any concerns or answer any additional questions that you might have until you are completely satisfied with the service provided. The FixYa rating system is a very important component of the Marketplace, and unfortunately once you post a rating or a testimonial to a solution, it cannot be changed at all later on. Be sure to use the small blue ADD A COMMENT button located just below the text of this solution to leave any additional comments for me regarding this particular issue and I will respond right away. I truly hope that was helpful to you. Good luck and take care. Joe.

Check the Main fuse inside the oven.And check the cause why it trip.
if it fused then check the transformer physically for sign of burnt.
I all above things okay.Then you need DMM to check the resistance of magnetron(oven has 5000 v in it even unpluging from main)(please dischage capacitor if you want to live more).
Thanks
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Hi,
Here is a tip that will help you to figure out what is wrong with yourMicrowave Oven....

Microwave Oven Basic Troubleshooting Tips

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Hi and welcome to FixYa, I am Kelly

When everything but the heat works there are 2 common components that fail. The high voltge capacitor or the high voltage diode. In rare cases the magnetron fails because the oscillator in the top of the magnetron sticks. When the oscillator sticks the magnetron makes a LOUD humming sound and you do not get heat. However.... a open diode or shorted capacitor will make the exact same sound briefly before the main in line / internal fuse fails.

The capacitor and diode are items 4 and 9 this link:
http://www.appliancepartspros.com/partsearch/model.aspx?model_id=504310&diagram_id=28243249#d28243249

NOTE: Before doing ANY maintenence you must hold an plastic handle screwdriver back on the handle and ground the capacitor terminals at least 3 times. (Just in case it has not failed.)
Failure to do so will ruin your day and pass along one heck of a shock.

To check the diode you must disconnect one terminal first. The read it with a meter. Reverse the leads and check continuity again. It should read continuity in ONE direction / polarity only. Id should NOT read open both ways or shorted both ways.

To check the capacitor you have to remove all the terminals from ONE side of the capacitor terminals. With the meter on R X 10,000 probe the 2 terminals. You should see a brief jump in resistaqnce and then the meter drifts to infinty. Reverse the leads and do this again. You must get the same jump in resistance and then the meter drifts to infinity. If it does not do this it has failed and must be replaced.

If both the diode and the capacitor pass the checks above the next step is to check the magnetron for continuity across the 2 terminals. It must read continuity. Even if this test passes the oscillator can be stuck and it will not heat. (Again if it is stuck it will make a LOUD humming noise.) It is not repairable.

I suspect you either have a bad diode (most probable cause) or bad capacitor (2nd most probable cause).

Thanks for choosing FixYa,
Kelly

Hi,
Here is a tip that will help you to figure out what is wrong with yourMicrowave Oven....

Microwave Oven Basic Troubleshooting Tips

heatman101