My microwave turns on but won't get hot. Is it a fuse or a diode problem?
Answer Hello Tzel. You need to test the diode, should only read one direction. If it is good, check the magnetron in the unit. Should read less than 1 ohm and have no cracks in the magnets. 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