Question about Microwave Ovens

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LG LRM2060ST microwave makes loud banging/popping noises when running. Possibly turntable gears / belt slipping or ??? Is this a common problem and can it be easily fixed? Microwave is a little less than one year old, so still under warranty. How would I get warranty service - bought this at a local Best Buy. Thanks

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  • Craig Mar 12, 2011

    I contacted LG service by phone today, since I had trouble getting my warranty request to go through via their website. The short answer is that they want me to go buy a new microwave - LG, Goldstar or Sunbeam, and then they will reimburse me for the cost of my old one. Apparently I need to send them the tag with model and serial number off the back of the unit. Anyone else ever experience this? This microwave is less than a year old, and they are willing to give me a new replacement one?

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If you were to contact Best Buy, they will give you the service departments information for a warranty repair.

Posted on Mar 12, 2011

  • 1 more comment 
  • specialistel Mar 13, 2011

    Speaking as an authorised agent for many manufacturers, it is more cost effective to replace or refund an item that is within the warranty period than it is to pay an agent to repair it.
    They require the label off the rear of the machine to close the case.
    It is uncommon for LG microwaves to fail due to manufacturing defects.

  • Craig Mar 13, 2011

    So this is fairly common practice? Yes,they did say that I would need to send them this label. The funny thing is that the microwave still works fine - it just makes this loud clunking noise when in use - but it cooks just fine. Oh well - I guess I will be picking up a new one shortly. Do they refund me the cost of the old unit, or the new replacement unit? I'm guessing they will be similar in price, since I will probably go with this same model.

  • specialistel Mar 13, 2011

    I think you are right. The price is governed by the old one. Handy though, cooking twice as much now, lucky!

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Just went through that same process for the same problem and am waiting for my check.

Posted on Mar 28, 2011

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  • Craig Mar 28, 2011

    I faxed in all the information they requested, and was awaiting their response letter spelling out the next steps in the process. Instead, I received a message on my recorder the other day saying that I needed to call them (again) since my microwave would be serviced instead. Has anyone else experienced this, or is this simply the next step in getting the microwave replaced under warranty?

  • Jdubyarogers Mar 28, 2011

    They didn't service mine or even try. I did have an extended warranty. Maybe that's the difference?

  • Craig Mar 28, 2011

    Not sure - but mine is still well under the one year warranty period...for now anyway. If we delay too much longer it will be out of warranty.

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1 Answer

Oven heats, but light, fan and turntable do not come on.


Hi Ted

many microwaves have safety mechanisms to reverse, or stop the turntable if it senses resistance to the turning. This is done both because
  1. the turntable is usually driven by a small motor with a gear reduction transmission to get more torque on the glass platter and your food, and if something resists the turning, it can damage the gear train or belt if it keeps running.
  2. if you have something with liquid in it and it hits a wall, it could tip over, possibly spilling scalding liquid all over and maybe surprising the person who opens the door.
In some cases, it'll just stop and then try again the next time you run the microwave. The banging on the case sometimes turning things back on suggests that either something in the turntable mechanism is awry, or that there is a common hot wire, ground loop, or possibly fuse for the light/fan/turntable.

the manual for the oven doesn't really say anything about this.

You can see generic intructions on looking for an internal fuse here
Panasonic Microwave NN CT552W has no power plug fuse ok Has it got thermal... . Please, in particular, make sure you unplug the oven before opening anything. This is one of those devices where defeating the interlocks and having it turn on can seriously hurt you.

With regard to the turntable, in particular, it's really easy over time for exploded spaghetti sauce, spilled cocoa, and overmelted butter to have run down into the indentation in the middle of the bottom of the oven cavity. Remove the platter. Is it clean in there? Does it look like the 'this person never flosses' picture for mechanical rotors? If so, start with some kitchen cleaner and a washcloth damp (not soaked) with hot water. Let the cloth steam /warm the area a bit, wipe it down. repeat if necessary. If there's a lot of cruft built up there, that could be keeping you on the edge of safety shut-down.

Good Luck!
D

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Take turntable motor off and examine teeth on it and on gear it turns. Access is from bottom of microwave

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follow this test 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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Nov 19, 2013 | Microwave Ovens

1 Answer

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make this test 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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make this test 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.

Nov 14, 2013 | Microwave Ovens

1 Answer

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follow this test 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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see this causes and proceed. God bless you
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.

Exhaust Fan Motor If the microwave is loud when running the fan motor might be
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.

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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