GE JVM1190 will not heat

Check for a reset on the back--if nothing, pull the cord and remove the case. Look for a blown fuse. If you find one blown, replace the high voltage diode in the magnetron power supply. Remove the sheet metal wave guide which covers the area where the microwave energy enters the cooking cavity. Under the wave guide there is a fan-like device called a 'stirrer' that has a plastic bearing which can short out due to an arc that passes through the bearing. Replace the stirrer and the blown fuse. The machine can be tested with cover off as long as you keep your hands out of it. Use a cup of cold water for a cooking load. Running the unit empty can cause a repeat of your problems. If you did not find a blown fuse, check the door interlock switch(es) for failure or coming loose from the mounting.

Check your door interlock safety switch. Unplug the device - remove the cover - DO NOT TOUCH THE SILVER THING IN A CAN. Look for the small probably black micro switch. Test it with a volt/ohm meter or contunity checker. It should read "closed" (or short) with the door closed and "open" with the door open. Replacement can be had from appliance or electronic parts store.

Let me know how this works for you.

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