Microwave is working perfectly, but it doesn't warm up. Ghasem
Answer Ghasem, No the the inline 20 amp fuse would not be he problem, or the thermal fuses, the microwave would be "dead" if that were the case. Your most likely culprit is a bad control board WB27X10874 or magnatron WB27X10880, if you are not familliar with high voltage, capacitors,transformers,etc. you need to be very carefull, so you don't hurt yourself. Thanks, and Good Luck
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I have ge model#jVm1740dm1ww microwave. Started by going off and waiting 30 seconds and then it would pop back on by itself, and now i have nothing. It is aroud 6 yrs old. Does this mean fuse went cause the on off period and then just blow.
You will want to test the door switches on the unit as they may have gone out. This would be the most likely cause but if they check ok then you will want to test to see if there is 120 vac coming to the control board. If there is 120 vac there then the control board would be faulty and need to be replaced.