Question about GE JVM1790 Convection / Microwave Oven

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The microwave heat works but the convection heat does not

In the middle of cooking dinner with the convection cooking it stopped cooking. The convection runs with no heat.

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You need to buy a new one because it is broken.

Posted on Jun 17, 2009

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I have a kenmore microwave/convection oven model 721.64289300. The microwave stopped heating up but the convection works fine. Is this repairable.


I would suspect you have a failed cook relay on the control circuit board, but that can be economically repaired.

Details are here, along with a disassembly video.

Oct 16, 2013 | Microwave Ovens

1 Answer

Wolf convection microwave


see the next steps , use the VOM and fix it. God bless you

  1. Check the power diodeThis electronic component is responsible for transmitting current in one direction. If the diode becomes defective it will cause your microwave to not heat. Test the diode and replace it if necessary.
  2. High voltage capacitorResponsible for storing electricity, this part is a key component in any microwave. Remove, discharge, and test the capacitor to determine if it requires replacement.
  3. Damaged magnetronResponsible for generating waves and producing heat. When your microwave is no longer heating properly, replacement will be required.
  4. Thermal CutoffsExamine the thermal cutoffs on both the magnetron and the oven itself. Take off one of the leads and using a volt-ohm meter on RX1, check the terminals. If you get a result other than zero, replace the thermal cutoffs.

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Jun 17, 2013 | Microwave Ovens

1 Answer

Sharp convection microwave oven model R1875F. It's cooking on the left side faster then the rest of the oven. It seems to burn on the left side and not cook in the middle.


see the next causes. 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 03, 2012 | Sharp R-1870 Convection/Microwave Oven

1 Answer

Electroluc convection microwave stopped working while cooking


Hi - From what you have described it sounds like the microwave possibly has a wiring failure or faulty control panel or magnetron. I would suggest contacting a professional that accurately diagnose and repair the unit

Oct 01, 2012 | Electrolux EMS2487X Convection Microwave...

1 Answer

The renter threw the tray to adapt the microwave to convection oven. I need to know where and how much a new one costs?


Are you talking about the black round pan? I don't think I have any other parts in my Advantium for speed cooking or convection. I occasionally just use an oven safe dinner plate. Sorry I can't help with replacement parts.

Jan 04, 2011 | GE Advantium 120 Convection/Microwave Oven

1 Answer

The oven stopped working it will not heat, warm or cook. Sharp Model R-1874F


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Here is a tip that will help you to figure out what is wrong with your Microwave Oven....

Microwave Oven Basic Troubleshooting Tips

heatman101

Sep 09, 2010 | Sharp R-1870 Convection/Microwave Oven

1 Answer

Microwave stop working


my microwave oven just stopped heating giving me a f9 error .lights are on clock is working and the panel is ok.

Jun 15, 2010 | GE Profile Spacemaker Over-the-Range...

1 Answer

Stopped working/got hot now work but 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

et12

Aug 15, 2009 | GE Advantium 120 Convection/Microwave Oven

1 Answer

GE Monogram Convection oven ZET837SB1SS


I would suspect a couple of wires are crossed.

GE puts mini-manuals in their units, which have wiring diagrams, schematics, etc. Very handy.

It will be folded up in a small envelope, usually behind the control panel or hidden elsewhere. That should help you.

Oct 26, 2007 | GE Monogram ZE2160SF Convection /...

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