Light and turntable works, makes a humming noise but does not heat
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SOURCE: GE Spacemaker XL1800(JVM1850CF001) - Loud Humming noise
You either have a bad magnetron tube (5 or 10 year parts warranty item through GE Factory Service 1-800-432-2737 or www.geappliances.com) or a shorted high voltage rectifier. I think the light being out is a secondary problem.
SOURCE: GE Spacemaker XL1800 does not heat
Possible bad heating element, You should remove the cover of the unit and look at the heating element with the power off. Until you get your problem resolved I would recommend not to even turn it on due to the fact that you are unsure what is going on and you smelt some burnt smell. Just for safety until you fine the problem
SOURCE: I have a GE Spacemaker xl1800 - Funny noise, flickering light
very possible your magnatron is faulty. Disconnect 2 transformer wires and make sure they dont short. try the program again. if no noise, replace magnatron:capacitor and HV diode Please i strongly suggest an electrician help you as it is truely dangerous in there. .
SOURCE: 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
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