My folks microwave Belling MGC850SS has stopped working - its switching on or heating up. I've tried changing the fuse on the plug and that has not fixed the problem. Any suggestions? Is this common and do these machines carry internal fuses?
Apparently this one has a mechanical timer. That lack of electronic controls does lessen the complexity. I don't know about the specific regulations concerning British / EU microwaves, but I'm sure there's a fuse inside. In most cases, just replacing a blown fuse will not be the cure, unless one finds the reason it blew. What made it fail (if it did) is the real question. Loose fuse holder allowed excess heat? Shorted component or wiring? Or, is there a failure in the mechanical timer that's causing an open circuit connection? That can certainly happen. Also, a door switch may have failed. This is most commonly caused by opening the door while it's cooking, instead of turning the oven off first. I would suggest you contact Belling service: http://www.belling.co.uk//CMPage.aspx?pageid=130&subsectionid=85§ion=ContactBelling Good luck.
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
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