Push the start button or just a number button machine runs fine. No load noises or humming. It just doesn't heat anything up.
Make sure that the program controller is working if not check
power - step down supply, the pads are responding- if not faulty pads- or the
door switches, if the switch contact are not good then it will not trigger the
processor to switch on the waveguides. If the lights or fan work without any
display or action of program being triggered to start then it can be a possible
fault on the main board or the processor. Sometimes insect secretion can short
the board and display panel and so the processor can work in such an erratic
manner. If so clean, solder and reset the board. Now identify the parts by
clicking this link: http://www.espares.co.uk/advice/microwave/a/5/141/identifying-microwave-parts.html If there is no heating
please do not switch on unless you have confirmed the fault. It is possible
that the Magnetron is faulty, the temperature cut off is faulty or the main
capacitor is short. It is also quite possible that insect can get into the oven
and create soft spots. When you switch on these will create a short and make
the voltage jump and in the long run damage the magnetron. Check this link to
know how a microwave works: http://www.espares.co.uk/advice/microwave/a/5/1443/how-a-microwave-oven-works.html So Remove cover after disconnecting , check for dirt/moisture in
the cabin, if so wipe clean and dry, check the magnetron and area clean and use
an jet air to clean off. Check the wave guide covers, if food had deposited
then it must be checked or replaced. See link: http://www.espares.co.uk/advice/microwave/a/5/1146/how-to-replace-a-microwave-guide-cover.html
A diode is an electronic component that
readily passes current in one direction only and blocks the flow of
current in the opposing direction. If your microwave's diode has become
defective, your microwave will not heat and you will hear a buzzing
noise. Test the diode to determine if this is the cause of your problem.
Replace it if it is defective.
A capacitor is an electrical device
which stores electricity. A defective capacitor may be why your
microwave is not heating but you are hearing a buzzing or humming noise.
The capacitor will have to be tested to determine if this is the cause
of your problem. A defective capacitor will have to be replaced before
your microwave will work again. Make sure you discharge the capacitor before you test it, though.
A defective magnetron is the third
possible cause of why your microwave is not heating, but you can hear a
buzzing noise. Test your microwave's magnetron. Replace it if it is
defective.
Hi,
Here is a tip that will help you to figure out what is wrong with your Microwave Oven....
Microwave Oven Basic Troubleshooting Tips
heatman101
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