Microwave-coming-on-but-not-heating, new well explained video here https://youtu.be/sgj0hvi6aj4 if your microwave works, has power and timer runs but there is no heating, the most common problem.... If your microwave oven doesn’t heat, you may have a problem with the high voltage diode or rectifier. this component helps provide the high voltage that powers the magnetron. the high voltage diode is located near the magnetron and the high voltage capacitor, so access will require removal of the cabinet., a microwave that does not heat up may have a broken magnetron. this is the part that makes the heat to cook the food. if it is broken, it may blow a fuse in your microwave which could lead to other components failing..
Did the keypad respond and the microwave start? yes no; did the water heat after the test? yes no; if the keypad does not respond, it is possible that the child lock feature is active.. child lock is a safety feature used to lock the control panel when cleaning the microwave, so that children cannot use the microwave unsupervised., when your microwave doesn't heat or start, it's probably in demo mode. however, there are some other things that can cause the problem such as door errors, an issue with the control panel, the setting being used, or not enough clearance..
** remember! ** the microwave can still shock you even unplugged!! always discharge the high-voltage capacitor first if you even think your hands will come close to any high voltage components. jeff mentions this: anything in the high voltage ( magnetron, capacitor, diode, wires to and from ):, start right here find appliance parts, lawn & garden equipment parts, heating & cooling parts and more from the top brands in the industry here. click on shop parts, or select the kind of product you're working with on the left and we'll help you find the right part. shop parts.
My first thought would be a blown magnetron. on microwaves, these can generally go dead, usually with a popping sound. i think there might also be a fuse in your microwave, but i do believe that if it was a blown fuse, your mw would not start up. the technician should also not forget the door switch since some of them can cause the same issue., if your microwave is making an unusual or loud humming noise, you may have a problem with the magnetron. this component is part of the high voltage circuit and provides the microwaves that generate the heat. if the magnetron is defective, it may cause a loud humming or buzzing noise. access to the magnetron will require removal of the cabinet.