Most common questions used to investigate
Is the microwave plugged in to an electric socket?
Does the microwave door latch function properly?
Did you check the microwave's ceramic fuse?
Did you check the microwave's thermal fuse?
Did you check the door switch?
Common conclusions
Your microwave isn't working because it is not connected to a power source. Plug it in and try again.
Door latch assemblies are made using plastic hooks which stick out of the door and signal other parts to power the appliance. If the hooks are not working or are damaged then the switch won’t latch and the microwave may not turn on.
The ceramic fuse is responsible for protecting other parts from fluctuations. Unplug the microwave and then access the fuse from inside the microwave near the power cord. To check the ceramic fuse's state, make use of a multimeter or ohmmeter. Touch one end of the fuse terminal with the black test probe and the other end of the fuse terminal with the red test probe. If the display on the shows the needle at zero or the digital display shows zero, the fuse is in good working condition - otherwise, change the fuse.
thermal fuses protect the appliance from overheating. Unplug the microwave and then access the fuse from inside the microwave near the power cord. To check the ceramic fuse's state, make use of a multimeter or ohmmeter. Touch one end of the fuse terminal with the black test probe and the other end of the fuse terminal with the red test probe. If the display on the shows the needle at zero or the digital display shows zero, the fuse is in good working condition - otherwise, change the fuse.
The door switch is the part of the microwave which signals to other parts to turn on when the door is shut and to turn off when the door is open. Unplug the microwave and then access the door switch from inside the microwave. To check the state of the door switch, make use of a multimeter or ohmmeter. Touch one end of the door switch with the black test probe and the other end of the switch with the red test probe. If the display on the shows the needle at zero or the digital display shows zero, the switch is in good working condition - otherwise, change the switch.
If none of the issues given above help you turn and power on the microwave, it is better to contact a professional.
References
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