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Oven comes on but will not heat food and hums.

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2 Answers

Makes a humming noise wont heat


If its making a humming noise, that means the diode is bad and should be replaced. Once replaced the microwave will begin to heat again.

Feb 11, 2011 | Kenmore 62622 Microwave Oven

1 Answer

I press #1 and hit start the blower works and light comes on but no heat


Sounds like the magnetron circuit has failed. It is the part that generates the microwaves that heat the food. It often shorts out, and makes a loud humming or buzzing noise when it fails. It's not usually cost effect to replace since the part alone can cost as much as a new oven.

Dec 06, 2010 | GE Spacemaker JVM1640SJ Microwave Oven

1 Answer

Loud noice and humming while completing heating of food. The food was not warm. Everything else works.


Hi,
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Oct 22, 2010 | Frigidaire FMV156DC Microwave Oven

1 Answer

Everything works but it doesn't heat up the food. What could it be?


The part that generates microwaves that heat the food is the magnetron. Typically when the magnetron fails, it shorts out. When that happens the oven will produce a loud buzzing or humming sound. It typically not worth the cost to replace the magnetron, because it is almost as much as buying a new oven.

Jul 01, 2010 | GE Spacemaker JVM1640SJ Microwave Oven

2 Answers

I have a GE Spacemaker XL1800, no heat and a humming noise.


magnetron problem DON'T KNOW IF WITH FIXING - WOULD LIKE TO KNOW MYSELF

May 02, 2010 | GE Spacemaker JVM1640SJ Microwave Oven

1 Answer

Food will not heat everything else is working


If it does not heat, with all other functions working, the problem lies with the magnetron circuit. The magnetron is the part that makes the microwaves to heat the food. Typically, the magnetron fails and shorts out. Symptoms when this occurs is a loud hum from the oven and does not heat the food. The replacement magnetron costs are close to the price of a new microwave oven, so it rarely pays to have it fixed.

Feb 16, 2010 | Goldstar Microwave Ovens

1 Answer

Microwave seems to work but does not heat food


OK, you may have a damaged thermostat or, the Magnetron may be damaged as well. you can test each device with a meter(ohm,volt).

replace any parts that dose not register.

Jun 03, 2009 | Panasonic Microwave Ovens

2 Answers

GE Spacemaker XL1800 hum/buzz noise but heating works


the magnetron needs replacement my friend, although you can still heat up food but eventually it will soon fail.
appreciate your kind comment

Apr 12, 2009 | GE XL1800 1100 Watts Microwave Oven

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GE microwave JEB1860 runs like normal but no heating i have a GE microwave JEB1860. it is little over 2 years old and has a problem. The microwave lights/turns/sounds/operates like normal except no heat. Absolutely no heat. Clues are that it started making sound like it was operating, when not being used with the door closed (doesn?t do it anymore.) Also few days ago a cup of milk was overheated and spilled in the oven. And before that many days ago I had a faint suspicion that the oven wasn?t heating fast enough. I used my digital multimeter to probe the following and they all check out right: . I checked both the primary and the door interlock switches and they are inf when door is open and 0 when closed . I didn?t check the monitor interlock since the fuse is still intact . I checked out the transformer. The primary input leads are 0.3-0.4 ohms (the shorted mutimeter probes itself reg 0.2). the filament leads are 0.2 ohms. Both set of leads are open wrt the ground. The high voltage lead registers 82 ohm to the ground (as is in the circuit diagram.) . the magnetron leads look pristine. They are short between themselves and open to the metal case. This also true with the multimeter leads switched. . the diode looked open (both directions) with the diode function on my multimeter but turned out to be not the case. My guess is that the 2v that my multimeter puts out is less than the cut-in voltage of the diode. In any case it is confirmed that this is not the problem because I replaced it and the heat isn?t there still. . the capacitor measures 959nF as is stated in the circuit diagram. Also the ohmmeter registers increasing voltage until it matches resistance of the 10Mohm internal discharge resister. . the temperature sensor is closed (0.2 ohm) so fine . humidity sensor tested fine as mentioned in the service pamphlet left inside the oven. (the inter-terminal resistances were not exactly as what was mentioned but seemed close enough) any thoughts on what might be wrong?

Feb 27, 2017 | General Electric JEB1860 1100 Watts...

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