Question about GE Microwave Ovens

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Microwave will run but will not heat. Model number jvm1660sb003.

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  • William Miller
    William Miller May 11, 2010

    When you hit Start to cook, do the inside light and turntable come on?

    Any unusual noises?

    Is it louder or quieter than usual?

    These answers will help me judge whether it's in the high voltage
    section (magnetron, transformer, or diode) or the control section
    (door switch or control board relay or connection).


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  • 2 Answers

Louder noises>>> already change the magnetron>>>

Posted on Jul 26, 2010

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1 Answer

How everything works but does not heat?


There are some good tips on this website
http://www.ask.com/question/my-ge-microwave-runs-but-does-not-heat

Could be the thermal cut-off relay has tripped, thermostat is faulty or very remote chance the microwave generator itself is faulty. Will need the model number to make any further assessment of repair.

May 01, 2014 | General Electric Microwave Oven

1 Answer

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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Help me find my model number
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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.

Enter your model number to see parts for your microwave.

Help me find my model number
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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.

Enter your model number to see parts for your microwave.

Help me find my model number
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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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Help me find my model number
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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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Help me find my model number
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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.

Enter your model number to see parts for your microwave.

Help me find my model number
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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

1 Answer

Morphy richards oven is not heating and not cooking anything


please proceed according 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. 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.
Enter your model number to see parts for your microwave.
Help me find my model number
picunavailable175.jpg

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.
Enter your model number to see parts for your microwave.
Help me find my model number
picunavailable175.jpg

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.
Enter your model number to see parts for your microwave.
Help me find my model number
picunavailable175.jpg

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.
Enter your model number to see parts for your microwave.
Help me find my model number
picunavailable175.jpg

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.
Enter your model number to see parts for your microwave.
Help me find my model number
picunavailable175.jpg

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.
Enter your model number to see parts for your microwave.
Help me find my model number
picunavailable175.jpg

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.
Enter your model number to see parts for your microwave.
Help me find my model number
picunavailable175.jpg

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 magnetron.

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Mar 01, 2013 | Morphy Richards Microwave Ovens

1 Answer

Microwave runs but does not heat. model number mt1510b All the settings go on and the turn table turns but there is no heat.


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

Microwave Oven Basic Troubleshooting Tips

heatman101

May 07, 2011 | Daewoo Microwave Ovens

1 Answer

Whirlpool model number MH7140XFB no longer heats


you either need a new h.v. capacitor or h.v. diode in the magnetron circuitry if you cant hear it cycle when it runs as in a low pitched hummmm when its drawing current to operate the magnetron tube, each part runs about $30 to $45 each,normally its the h.v. capacitor though

Jul 28, 2010 | Whirlpool MH7140XF Microwave Oven

2 Answers

My Russell Hobbs microwave will not generate heat


If everything else is normal, the trouble may be a failed magnetron tube (the microwave source), problems on the control circuit board, or parts in the tube power circuit that are bad. It's also possible a door switch can be at fault, but this usually keeps something else (fan, turntable or light, most often) from running as well.

Microwave servicing is best left to professionals. There are potentially deadly voltages present, and a chance of microwave leakage if repairs aren't done correctly. Take the oven to a shop for an estimate, or just consider replacing it if it isn't a built-in, an over the range unit or a high-end countertop model.

Feb 02, 2010 | Microwave Ovens

1 Answer

MICROWAVE OVEN DOESN'T HEAT. LIGHTS, FAN, TURNTABLE, TIMER ALL WO


If everything else works on the microwave, but it simply does not heat, the magnetron is a logical guess. There are also three other components that make up the High Voltage network: HV transformer, HV Capacitor and HV Diode. The magnetron, however usually is the component that fails more commonly. If the model number you have this listed under is correct, you can view all these components at appliancepartspros.com. Just type in your model number and look under the "Cavity" section. The magnetron runs around $86. If you decide to repair this, please let me know. A microwave oven is not an appliance for a DIY beginner to start with. The High Voltage network has potentials of 3000 to 4000 volts and safety is important. If this is not your model number, post back with the correct info. I hope this helps you.

May 04, 2009 | Maytag MMV4205 Microwave Oven

1 Answer

Jenn Air Microwave M169W will run but not heat


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

Microwave Oven Basic Troubleshooting Tips

heatman101
zcvzcv

Jan 28, 2009 | Jenn-Air JMC7000 Microwave Oven

1 Answer

Microwave won't heat


The two possible causes are a faulty door switch and a bad magnatron. You can pull the top cover off of the unit and check all of the door switches (there are 2-6 of them all on a common rail, me normally closed)). If the door switches all check out, replace the magnatron, diodesmag-glass_10x10.gif, and capacitor

Oct 28, 2008 | Kenmore 62622 Microwave Oven

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