My LG microwave shuts itself on and off. Say I put something in to cook for 3 mins. After about 1 min the unit will shut down for 15 to 30 sec. then turn itself etc

SOURCE: GE Spacemaker Oven shuts off after 3 min

Had one of these brought into shop. Customer complained it would run for 3 minutes (on high), then would shutdown and clock would reset. We noticed that there was no fan sound coming from it when we first ran it. Bingo! found magnatron cooling fan blade came off the motor shaft. After getting into it, found that there was no E-clip or any other fastener. The blade was glued on only. So we used a two part 5 minute epoxy glue and reattached, let glue cure and ran repeatedly to make sure no damage had occured to Magnatron or supporting components. All is well now! Hope this helps someone.
Jay

SOURCE: ge spacemaker model # jvm16505ho1 won't stay running

I have the same problem. It was/is a wiring issue behind the key pad. I unplugged the microwave and took the vent and key pad covers off - heed all warnings. Using leather gloves and needle-noze pliers, I removed the wire ties and reposition the wires. I also checked the plastic connectors for looseness. It's currently working, but for how long who knows. Mine is 3+ years old. I will never by another GE product.

I suggest you don't tackle yourself as the capacitor can hold thousands of volts even w/ the unit unplugged. Be careful.

SOURCE: When the microwave runs longer

Hi, I have this site below for you. This is actually a PDF file for the user guide and troubleshooting guide for your device issue. I hope this will help you.


http://www.ajmadison.com/ajmadison/itemdocs/PDF_GE_JVM2070_user_manual.pdf