Question about General Electric JEB1860 1100 Watts Microwave Oven

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Display works, turntable turns, but it won't heat.

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If it making a loud humming or buzzing noise when it is turned on, it could mean that the magnetron has failed. If that is the case, then it typically not worth fixing, since the cost to repair is almost as much as a new oven.

Posted on Aug 23, 2010

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Check the fuse first.then megnetron.most of time the fuse is blown and the oven seems to be fine but not working.

Posted on Aug 24, 2010

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1 Answer

My under cabinet microwave is not working correctly.


The possible reasons are: 1) The high voltage transformer is broken, 2) The magnetron is broken.

For the 1st problem, no power can be applied to the turntable.
For the 2nd problem, the magnetron is broken with no microwave can be issued.

Jul 14, 2015 | GE Microwave Ovens

1 Answer

My kitchenaid microwave will not heat in microwave mode. In fact the turntable starts and stops and the display blinks intermittenly. In convection oven mode everything works fine - It heats, turntabl


The magnetron is the main part that gives out microwaves to heat the food. As the convection bit is working this points towards the microwave bits.
The magnetron has a main diode, fuse and transformer to run the microwave bit, any of these could be faulty. A word of warning though, there are extremely high voltages inside microwaves, even when unplugged in the main capacitor. Also to repair this section you will need to be a fully qualified engineer to even order parts for this.
Find a microwave technician who can repair for you

Nov 04, 2014 | Microwave Ovens

1 Answer

Kenmore 721.80403 microwave won't heat


If the turntable does move as well it is likely the inverter (power) or the Magnetron itself.

Nov 03, 2012 | Kenmore Microwave Ovens

1 Answer

Everthing works but won't heat


If turntable works suspect inverter (power) or Magnetron itself is bad.

Oct 29, 2012 | GE Spacemaker JVM1640SJ Microwave Oven

1 Answer

Goldstar under counter microwave spindle won't turn


use the common sense, and logically, fix it. God bless you
Microwave Runs, Heats, but turntable does not move This is a fairly easy one. First, make sure the turntable coupler under the glass dish is not broken. Second, on the control board, find the turntable relay and test for voltage. Some turntable motors are 24 volts DC, so make sure your testing the correct voltage. If no voltage from the control board, then replace the control board. Otherwise head towards the turntable motor.
On OTR models, you can get to the motor by un-screwing the bottom panel on the microwave. On countertop models, there will either be a knockout or screw on access panel. Check for voltage at the motor. If no voltage, check the wiring back towards the control. If voltage, then replace the turntable motor. The component list below also shows how to test a turntable motor.

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Aug 02, 2012 | GE Microwave Ovens

1 Answer

Prestige gs25 microwave won't heat


no the problem is more than your fuze! Micro waves have a high voltage output transformer inside that goes bad. You can fix it yourself but if your not good with electronics I would have someone else do the job!

Feb 07, 2012 | Microwave Ovens

2 Answers

Oven suddenly lost heat, inside fuse is OK though. Display, fan, turntable all working. Is it magnetron or its power supply?


You're right, if the lights come on and turntable moves, it is most likely your magnetron.

Jan 23, 2011 | Microwave Ovens

1 Answer

Sharp 1870 just quit cooking and no turntable


The fact that the microwave and convection both do not heat indicated that the oven is in demo mode, check the user manual, otherwise it will possibly be a relay not triggering, may need a pcb replacement, check Demo mode 1st....Phil

Jan 08, 2009 | Sharp Microwave Ovens

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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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