Question about Microwave Ovens

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Microwave Model # JVM1650,51,JVM1660 The microwave turns on but does not cook food. The motor make a abnormal sound. Wire burning smell coming out of vent above the door.

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Sounds like a fan motor is bad probly cheaper to get new one than fix

Posted on Jan 22, 2009

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Cook temp not working


follow this steps and test with VOM. God bless you

Diode


The high voltage diode converts the A/C power output of the transformer to D/C, doubling the voltage to nearly 5,000 volts. This high voltage powers the magnetron which emits the energy that cooks the food. If the diode burns out, a lower A/C voltage reaches the magnetron, which is not sufficient to power the magnetron. When the diode fails it is often visibly burned out. If it appears to be good, it can be tested with a volt-Ohm meter capable of testing diodes. High voltage diodes frequently fail and are one of the most common points of failure in a microwave oven. A regular meter with a diode checker will not work to check these diodes. You have to use a meter with a 9 volt battery or put a 9 volt battery in series with the diode to check it.

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Door Switch


If the microwave does not heat, one of the door switches might be defective. Microwave ovens normally have three door switches, if any of them fail the microwave does not turn on and does not heat. Check the switches for continuity with an Ohm meter.

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Magnetron


If the microwave oven doesn't heat the magnetron tube might have burned out. The magnetron uses high voltage, high current DC power to generate the microwave frequency that cooks the food. If the microwave oven is turned on when it is empty this can cause the magnetron to burn out. Once it is burned out it has to be replaced, it's not repairable.

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High Voltage Capacitor


If the microwave doesn't heat the high voltage capacitor might be defective. The high voltage capacitor works with the high voltage diode to convert the output of the transformer to DC voltage and to double the output voltage. If the capacitor is burned out the entire high voltage circuit stops working properly. The high voltage capacitor can be checked with a special VOM meter which has a capacitance testing capability. Be aware that the high voltage capacitor can retain a charge of more than 3,000 volts and can injure or kill a person if not handled properly. Only trained technicians should perform this type of testing.

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High Voltage Transformer


If the microwave does not heat, the high voltage transformer might be burned out. Microwave ovens produce a very high voltage in order to power the magnetron antenna, which emits the energy that cooks the food. When a high voltage transformer fails it will usually arch and have a burning smell.

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Thermal Fuse


If the microwave doesn't heat the thermal fuse may have blown. It can be tested for continuity. Watch our fuse testing video for more information.

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Thermoprotector


If the microwave doesn't heat the thermoprotector may have tripped. This is a safety device to prevent the microwave from overheating. It can be tested for continuity to see if it's blown.

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Main Control Board


If the microwave doesn't heat the main control board may be defective. This is not common. When a microwave doesn't heat the problem is usually a faulty door switch or within the high voltage circuit; either the high voltage capacitor, diode, transformer or magn
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Apr 02, 2013 | Maytag MMV4184A 1000 Watts Microwave Oven

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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

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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

My frigadare microwave runs normal but wont heat the food


From the description you have provided, the magnetron has shorted. This a job for a professional because there is lethal voltages present that will kill.

Mar 27, 2012 | Frigidaire Microwave Ovens

2 Answers

Cooked food smells funny,could it be a leak?


Unless you can associate the odor with burning electronics, it probably isn't being caused by the microwave.

Mar 17, 2011 | Emerson MW8626W Microwave Oven

1 Answer

Wire burning smell from Microware


unplug it.....if on fire, use dry chen extinguisher, if still persistent, dial 911 n get out of the house

Apr 23, 2010 | Thermador MBBS Microwave Oven

1 Answer

I have a Kenmore Elite microwave oven... 69-65e05590-000637. We noticed that it would not heat food or liquids... played with the power level a bit and it started to heat again...then a day or two later we...


Is this oven still under warranty? If so, take advantage. If not, remove the power plug and the case. Short out, with a screwdriver, the large can-shaped capacitor with two terminals sticking out. Check the wiring and circuit board for signs of burning. If everything looks ok, remove the thin sheet metal wave guide that sits above or beside the microwave energy port into the cooking cavity. Under the sheet metal, there is a metal fan-like device called a 'stirrer' that has a plastic bearing. Remove this stirrer and smell the bearing. If it smells like the burning wire smell, replace the stirrer. You can buy it through 'Sears Parts' online.

Sep 14, 2009 | Microwave Ovens

1 Answer

Microwave light


my kenmore microwave model # 66222, doesn't let the steam out, its ventilated so I know thats not the problem, smells like its burning then shuts off and doesn't come back on until its cooled off, this happened when cooking a Baked Potato, also when I cook something for over 5 minutes

Aug 13, 2008 | Microwave Ovens

2 Answers

Burning smell , Microwave not turning off


the control circuit shorted out from the cleaning session and kept the microwave on so long with nothing to cook that it has cooked itself I'm sorry to tell you. Probably not worth repairing

Dec 27, 2007 | Kenmore 62702 Microwave Oven

1 Answer

GE Microwave doen't heat any food or liquids


PROBLEM MAY BE A RELAY ON THE CONTROL BOARD OR MAY BE A LOOSE WIRE FROM THE HV TRANSFORMER CKT.

Sep 06, 2007 | GE JVM1660 Microwave Oven

1 Answer

GE JVM1660 1000 Watts Microwave Oven beeps every minute


Maybe u should contact ur retailer or the manufacture helpline and tell them your problem they might be able to tell what's wrong.

Feb 28, 2007 | GE JVM1660 Microwave Oven

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