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Re: my microwave doesnt work at all
If the micro is completly dead and the outlet is OK... check the main fuse inside the cover. Unplug unit, remove cover (screws in back) and check the fuse where the power cord comes in through the back.
I am not sure what region you are in but in the States it is usually a 15A fuse. REPLACE ONLY WITH EXACT FUSE. Most hardware stores have these for microwaves.
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Please remove the cover and check the door safety interlock switches. Check with a contunity checker or a volt ohm meter.
What happens is thjis: when the oven is running ane you open the door, the tiny contacts in these little swirtches arc and burn. Eventually, the switches fail. When this happens, the oven doesn't know the door is closed. When The door is open, the oven will not turn on the magnatron. No magnatron, no heat.
It could be the start capacitor, but not likely compared to the switches. Dont try to service the capacitor unless and until you understand the danger.
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Please check the door safety interlock switches which you will find opposite the door hinge. Check them with a volt./ohm meter. You will hnave to remove the cover. Dont fool with the start capacitor.
What typically happens, Richard, is if you open the door while the oven is working, the switches arc and will eventually burn to the point that they cannot complete the circuit. When this happens, the oven thinks the door is open and it will not turn on the heat (magnatron).
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This isn't exactly a solution but information that might help other Sharp product owners. I acquired a Sharp Combi Microwave oven - an expensive looking stainless steel piece of equipment. All works except the LCD screen. It seems that others have this problem too. I am not sure of the guarantee BUT In the UK I phoned the Trading Standards Officer and his info is very interesting indeed: Apart from the normal guarantees, any equipment sold should have a normal useful life of 6 YEARS! Therefore if the item has a 'generic or 'inherent' fault the cmpany should repair or replace the item up to the 6 year period. This was news to me! Why should companies sell expensive stuff when the is something just waiting to go wrong? They just shrug their shoulders and say it is out of guarantee! In the UK, at least, that is not quite the end of story. So I intend to chase up Sharp and see what they have to say about the fault on mine. Ralfwil
I have a simular model and I found that the circuit board has three black relays, one for the grill one for the convection and one for the microwave. I found that the microwave one wasnt working so by swaping the microwave one with the convection one I got it to work and then replaced the faulty one with a new one at a later date.
It may be a bad door switch or a door alignment issue, or it may be a problem with the control panel.
If you or someone you know decide to look into it, we have critical safety information, info on door switch diagnosis and replacement, and disassembly information at our site, and our link is at our listing here on FixYa: http://tinyurl.com/yzjozk
Please write back with your model number if you need further help.
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