My GE JE2160SF Microwave is working normal other than the fact that it does not heat up. The display panel works fine. Any ideas please. Its my first time using a forum too.

Alex, look here FREE Microwave Oven Repair and Fix Finder and read about safety precautions and discharging HV capacitor. Your wiring diagram is probably under the housing or outside cover. unplug the over and remove the cover.

You can test the diode with a fairly fresh 9 volt battery and a digital dc volt meter or multimeter. Most of these little meters dont care if you put the black or red lead on battery plus terminal. They will just show a negative voltage when connected backwards. Set scale to measure at least 10 volts DC. You only need to lift one end of the diode from the microwave , but removing it is ok too.

Connect one end of the diode to one of the battery terminals and the other end of the diode to one of the meter leads. Then connect the other meter lead to the other battery terminal. The meter should read about zero volts or about 4 to 6 volts. Reverse the diode connections. Your reading should reverse. That zero volts probably wont be zero but might be a few millivolts. In other words you should see about zero volts one way and 4 to 6 volts when you reverse the diode connections. The 4 to 6 volt reading may be -4 to -6 volts. If you are reading a negative voltage just swap the meter leads. A bad diode will give the same meter reading when you swap the diode connection. If it is burned open you will read zero volts or if shorted you will read about 9.5 volts or whatever the battery terminal voltage is.