Question about Magic Chef CMV1000B Microwave Oven

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Microwave has works but doesn't heat

Quasar microwave has never heated. Everything comes on, sounds like it's working but doesn't heat food.

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Sounds like the Magnetron has stopped working. The Magnetron is is a specially designed powerful magnet that generates the high frequency microwave energy used to heat food.

Posted on Jun 14, 2009

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Posted on Jan 02, 2017

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Maytag microwave problem everything seemingly works but does not heat. Help


see this causes and fix it. 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.

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.

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.

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.

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.

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.
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.

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 within the high voltage circuit; either the high voltage capacitor, diode, transformer or magnetron.


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Oct 01, 2012 | Maytag MMV4205 Microwave Oven

1 Answer

My microwave comes on lights work but doesn't heat food


The most likely cause is a defective magnetron, "heats food" cost to repair will be close to a new microwave oven.

Jun 02, 2011 | GE JE1540 Microwave Oven

2 Answers

MY MICROWAVE DOEST HEAT, IT LOOKS LIKE WORK NORMALY BUT DOESN HEAT


pull your magnetron connector out and clean the both pins with alcohols or a metal cleaner and then fix it again and use. magnetron will work surely.

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2 Answers

Does everything but heat food.


Sounds like the magnatron tube or it's fuse.

Aug 11, 2009 | Kenmore 80809 Microwave Oven

1 Answer

My Sharp R-340D microwave works perfectly but Does NOT HEAT FOOD


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

Microwave Oven Basic Troubleshooting Tips

heatman101

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Sep 22, 2008 | Sharp R-1610 Microwave Oven

1 Answer

Microwave does not heat/cook


hi

power spikes are very damaging to a microwaves internal parts, it sounds like your transformer and/or magnetron are blown. if the unit is out of warranty I would recommend calling a repairman or getting a new microwave (the transformer & magnetron are expensive and dangerous to work on) also get a small single plug surge protector for the new one.

Mar 21, 2008 | Microwave Ovens

3 Answers

Microwave won't heat food.


built in 3/94 is it worth fixing how much for magetron

Dec 30, 2007 | Maytag MMV1153A Microwave Oven

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