Question about Microwave Ovens

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After filling with water, motor makes a very loud sound. I have cleared parts away inside the tub to expose the sump (part 8268382). No serious debris visible. With sump exposed I tried it again... same result. I have NOT tried running it "normally" simply ignoring the noise because it sounds like something has gone really wrong! I stopped using the dishwasher as soon as this symptom appeared. What now? Do I strip out the sump seal (part 8268395) and check further? Or try something else? History: I just replaced the motor capacitor (part 8269507) as it had been leaking a yellow fluid for several months. Previously I have replaced the heater element and circuit board. About the time the noise appeared I was planning to try to determine if the unit was filling properly, and generally working OK. The dishes were generally clean but the unit did not seem to be operating as well as it had previously. Unit is less than 10 years old.

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  • Gary Weiss Oct 04, 2009

    I'll investigate the water inlet valve; I was concerned that I wasn't getting enough water to submerge the heater element (one repairman told me that this unit uses the heater to raise the water temperature, not just drying.) Now, water hammer is usually a 'clunking' sound, correct? My sound is more like a high pitched whine. It sounds like something is spinning very fast.

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A better description of the noise would help as different noises mean different things. Turn the motor manually and see if you hear the noise. You can disassemble it and check the lower impeller but I would have replacement seals on hand.
Eric

Posted on Oct 04, 2009

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  • Master
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Hi,

Its issue with the Water-inlet valve Most cleaning problems are caused by the dishwasher not getting enough wash water, so the water-inlet valve is often to blame. This valve is usually at the bottom left or right of the dishwasher, behind the lower access panel. It's the device with the main water line from the house, a rubber tube to the dishwasher, and two wires attached to it.

When a water-inlet valve is defective, you may hear the sound that's usually referred to as "water hammer." If the water-inlet valve is defective, you need to completely replace it.


Please leave me comment, if you need further assistance
RNJ VINODKUMAR

Posted on Oct 03, 2009

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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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Microwave makes sound like something moving inside


follow this steps and use the VOM , and fix it. God bless you

  1. MagnetronIf your microwave is emanating high pitched or growling noises during operation, the magnetron could be going bad. Normally a nearly silent part, the magnetron uses high voltage and induces the frequency required to cook food. Although normally not a safety hazard to operate, this is a sign that the magnetron is failing and will need to be replaced as soon as possible.
  2. Exhaust fan motorIf your microwave is making a very loud humming noise during operation, it could possibly be the exhaust fan motor. If defective the part will need to be replaced to silence the appliance once more.
  3. Stirrer motorAnother leading cause of a noisy microwave is an expired stirrer motor. With use this part becomes worn and makes a loud grinding noise, which is usually a leading indicator that the part needs to be replaced. The stirrer is a metal blade that is slowly turned by the motor. This action disperses the microwave energy in a random pattern, which heats the food evenly. If the stirrer motor is determined to be nearing expiration, it should be replaced to halt the grinding noise.
  4. Turntable motorA very common cause for a noisy microwave is a worn out turntable motor. This is a relatively easy repair and will put an end to the noise once replaced.

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Jun 18, 2013 | GE JVM1490 Convection/Microwave Oven

Tip

How to change a microwave oven fan motor.


When your microwave makes loud noises, and they are eminating from the fan motor you will need to replace the motor. It no doubt has bad bushings. If not oiled periodically, and who does this, the motor will gall the bushings and make a loud screeching sound. Sometimes just oiling the motor after the sound starts will solve the problem, but most likely only temporarily. A permanent solution would be to replace the motor.

Unplug the unit. If your unit is not a freestanding unit and is mounted under the cabinet it will have to be removed from the cabinet first to continue. Usually this requires two people and the removal of two screws inside the cabinet above the microwave, tilting the unit down at the front and lifting the back of the unit off the mounting rail.

Remove all the screws from the rear of the unit case, perimeter and slide the cover off to the back. The motor should be visiable at this point. If it is not there could be a guard over it which should come off with one or two screws.

Go to http://www.repairclinic.com where you can get the new motor. They generally have parts for everything and at the best prices.

The mounting procedure should be obvious, either two or four screws. Remove and replace the motor. The motor wires should be spade lugs. Remove and replace one at a time to avoid any confusion.

Reassemble the unit by reversing the procedure listed above and remount under the cabinet if originally mounted under a cabinet and you should have a quiet running microwave.

hardrocko

on Apr 09, 2010 | Microwave Ovens

1 Answer

The oven has trouble ligting,and make,s a boom sound when lighting


Magnetron


If the microwave is loud or noisy only when cooking, the magnetron tube might be defective. The magnetron uses high voltage, high current DC power to generate the microwave frequency that cooks the food. Under normal circumstances the magnetron is nearly silent. However if it is damaged or nearly burned out it can begin emitting high pitched or growling noises. It's not normally dangerous to use a microwave oven when it makes these noises, but they are an indication that the magnetron is almost dead and will need to be replaced.

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Exhaust Fan Motor


If the microwave is loud when running the fan motor might be

Enter your model number to see parts for your microwave.

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Stirrer Motor


If the microwave is loud or noisy the stirrer motor might be worn out. The stirrer is a metal blade which slowly turns around, deflecting the microwave energy in a random pattern inside the microwave oven. As the motor nears the end of its useful life it begins to make grinding noises. The microwave will not heat food evenly without this stirrer, the motor should be replaced.

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Turntable Motor


If the microwave is loud or noisy the turntable motor might be worn out. This is a common problem and relatively easy to replace.
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Apr 02, 2013 | Microwave Ovens

1 Answer

Burning smell motor not working


Unplug the oven and unfasten the cabinet body, using a screwdriver. The body should be attached along the back as well as along the sides or bottom.


Slide the cabinet body back slightly to clear any internal brackets, then lift it off.


Clean the oven, using a vacuum with plastic crevice attachment. Vacuum the fan and other internal parts, then vacuum the vents underneath the oven, on the back and inside the chamber.


Reassemble the oven and plug it in.


Fill a small bowl with a 50-50 mixture of water and white vinegar, then set it in the oven and turn the oven on high for 5 minutes. When the mixture boils, it will remove stubborn smells inside the vents and loosen food particles on the oven walls.

Oct 05, 2011 | Panasonic NN-S963BF Microwave Oven

1 Answer

The turntable on our Whirlpool VT256 oven has


it could be 1 of 3 things here 1 the coupling under the plate mat be warn or broken inside so the shaft of the motor maybe turning but not turning the plate take the plate out and put a cup of water in the unit and see if coupling moves without the plate if not thn see if you can remove the coupling and repeat the test if you can see the motor shaft moving thn u need a new coupling, if not thn you may need a new motor to test th motor you will need to turn the unit on it side remove the plate first on the underside on the unit round where motor is you will see a plate this will round or square you need to cut this away to expose the motor dont throw it away as you need to refit if after, it turns round and you screw it back on, when you have found the motor remove and replace it albeit the motor is powered by the pcb it is unlikely to be the pcb as the motor runs all the time so they do ware out also do look to see if your unit has a turn table switch off button on the controls or in the manual hope this helps and dont forget to unplug ur unit from the mains.

Oct 17, 2009 | Microwave Ovens

1 Answer

I'm getting a flash inside the oven and the plastic on the inside roof has a burn mark. I removed the plastic cover over the micro wave generator and it did not spark. is the oven dying? It is a 1983 0ver...


It looks like the metal part inside the oven is exposed to the high frequency rf waves. this may sound strange but try coating the metal part with fresh paint. remember no metal inside the oven will stand the waves created inside the oven the spark u see is the waves hitting the exposed metal part inside the oven

Oct 13, 2009 | Magic Chef MCD1311ST Microwave Oven

1 Answer

JVM1440 BD - has a loud noise when I turn it on


Sounds like the "hub" for the turntable is worn. either that or the actual turntable motor. also insure the "plate" has a ring under it with wheels. sometimes I find those missing which in turn put far too much loud on the hub & motor, hence wearing them out pre-maturely.

you should be able to pull the hub out from inside the oven, if not. remove the filters below and if you twist just right you should see a small round device mounted with two tiny philips head screws, that's the turntable motor. It's usually the "hub" that wears though, so it's likely an easy fix. The most difficult part may be finding the new replacement part itself.

hope that helps,

good luck

Sep 26, 2009 | GE JVM1410 Microwave Oven

1 Answer

Microwave won't turn on anymore.


The model number may be on a sticker on the inside of the cooking cavity. Or it may be on the edge of the door, or on the lip inside where the door closes.

There are three protective devices in most ovens that can cause it to be completely dead. There's a main power fuse, then two safety thermostats. One is on the cavity to shut off power if something overheats, like if food catches fire. The other is on the magnetron tube (the microwave source) to shut the oven down if the tube overheats. You can test these parts with an ohmmeter. They should be short circuits if good, open or very high resistance if bad.

While the fuse usually blows for a reason, it can sometimes just fail as can the thermostats. So if the fuse is blown, change it. Just be sure to use the same type and rating. The special microwave fuse is available at Home Depot, Lowe's and appliance parts stores. If the fuse blows again right away, there's something more serious wrong with the oven. Then you should probably just replace it unless it's a very high-end model or a built-in.

If a thermostat checks bad, they are available from appliance parts places. Take the old one along so you get the right replacement.

If you have any doubts about working on a microwave, take it to a professional for service if you want to keep it. There are potentially lethally voltages exposed with the cover off and power applied. But if you've worked on electical appliance before and are careful, there's not much to doing it yourself.

Apr 24, 2009 | Microwave Ovens

1 Answer

Panasonic microwave nn-s963bf making grinding noise


The turntable system consists of the motor, the coupler, the turntable support with rollers, and the tray.

You can see and hear a video of how a turntable motor should sound when you rotate it by hand.

If yours is not set to be off via the control panel, and it won't rotate or it sounds like it's grinding, etc., you may have a bad motor or plastic coupler.

To replace either, you need to unplug power, then remove the bottom cover of the oven.

You can
order parts for this brand from Encompass (formerly Tritronics). Or you can call them toll-free at 866-779-5835.

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

Mar 04, 2009 | Panasonic NN-S963BF Microwave Oven

1 Answer

Crackling/sizzling sound


If you're hearing a crackling noise and don't see any sparks, you may have a magnetron that is arcing inside the waveguide. Once this arcing occurs, in some cases, replacing the magnetron may not be enough to fix the problem. There was also a noted problem with some models where the stirrer motor shaft inside the waveguide would arc when the magnetron was energized. This too, caused damage inside the waveguide. If the internal walls of the waveguide become damaged it cannot be repaired and the unit must be scrapped. The waveguide has a special coating to help propagate waves of RF energy. If the walls are damaged due to arcing this special coating gets burned off and will continue to arc even if a new magnetron is installed. This will eventually lead to magnetron failure and potentially cause a fire inside the oven. I would think seriously about looking into another unit if any of this may be occurring in your oven. Better to play it safe, especially with small children. I hope you find this advice helpful. PS A new magnetron can run as high as $250.

Jul 09, 2007 | GE Spacemaker JVM1640SJ Microwave Oven

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