Microwave works but will not heat up food. What is the problem?
Answer Hello Tom. Test the magnetron and make sure it reads less than 1 ohm. Also, make sure the diode only reads in one direction. If it reads both ways, it is bad and will need to be replaced. You can test this with a multi-meter TJMA-DMT3. Here is a link on how to use a multi-meter. http://forum.appliancepartspros.com/oven-repair-including-ranges-cooktops/4810-how-check-continuity-ohmmeter.html