The microwave tray rotates, display shows nothing out of the ordinary, loud buzz noise, louder than the fan. Nothing heats. My understanding is there were problems with the magnatron on this model, and GE had a "kit" they used on this affected model.
Answer Hello Dave. You most likely have a "high voltage" side malfunction. Transformer, diode, magnetron, Capacitor. You will need to be extremely careful if you decide to test the components with a multi meter, Very high residual voltage is present, so make sure you remove power to the microwave and short across the terminals on the capacitor. The magnetron should have a reading of less than 1 ohm resistance across the two terminals, and an "open" circuit between each terminal and chassis ground. The diode/rectifier should have a resistance reading in one direction only, no resistance, or resistance in both directions indicate a faulty diode. The primary winding on the trans former should read approximately 450 Ohms resistance, the secondary winding should read 80 ohms resistance, and the filament transformer should read 100 ohms resistance. If all the readings are proper and in range, replace the magnetron.
My micro wave is 1-1/2 old now having problems warming up food. and ideas whats wrong. Is it cheaper to fix if or buy a new one.
Answer Hello Michael,
It could be any number of things that could cause unit to not heat. It could be a bad magnetron, diode, thermal fuse, capcitor or HV transformer.