About a year ago the convection part of the oven died. Now when I use the microwave the plate does not spin the timer counts down as usual and the fans run but nothing gets heated. There is no unusual noise coming from the unit.
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Hello, there is a component that is pulling more current than it needs to be. I
would check the microwave HV diode there could be some leakage to ground. Also,
the mega-tron tube might not be working the way it should. If the mega-tron tube
is going out. Just replace the microwave oven. It is to cost prohibitive to
replace the mega-tron.
If you replace the microwave oven. Please recycle your old microwave. Boy
Scouts, recycling centers, some charitable organization will recycle.
It sounds like one of the door micro switches is bad. There are three
micro switches typically. A primary interlock, a secondary interlock and
a monitor switch. It is most likely the primary or secondary interlock
switch. You may need to take your switches to a professional appliance
shop to determine which one is bad.
Is it totally dead? No display? Or just does not cook? If it made an unusual noise before it 'died' something probably shorted out.... You need an ohm meter to troubleshoot. If the fuse is open, switches and HV circuit need to be checked before replacing fuse. Sometimes on the convection Microwaves (not just Sharp) the fuse will 'rust' and open rather than blow. Or the fuse holder can over heat and fail.
When you close the oven door the latches operate a couple of interlock switches that control power. It may be that one of the door switches is bad or out of adjustment. It's also possible that one of the door latches is broken so it's not hitting the switch. There should be two door latches. Are they both there?
This oven could be fixed by adjusting or replacing the interlock parts as needed. Because of concerns about microwave leakage from an improper door seal, you should have this oven serviced by a professional.