Question about Microwave Ovens
Sounds like the high-voltage magnetron (the heating unit) is not getting power. It could be as simple as a broken wire inside the unit (which would explain the spark) or a failed control board or high-voltage power supply (which also might let go with a spark).
Posted on Nov 06, 2014
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Posted on Jan 02, 2017
This is typical of a failed magnetron: the part which actually supplies the microwaves.
By their very nature magnetrons can fail without warning from the day of manufacture but the vast majority do last longer than the manufacturer's warranty. I have noticed a trend towards more frequent premature failure with increasingly powerful ovens.
If the magnetron has failed then there is nothing you can do to fix this as it must be replaced. It's also typically the most expensive single component in most ovens so is rarely an economic repair.
Your appliance should still be within the manufacturer's warranty so you should follow their advice regarding getting the oven repaired. If you're in the UK then you have Sale of Goods Act protection for up to six years from the purchase date and if you wish can insist that the retailer replaces the oven or refunds your money as the goods were not "of satisfactory quality".
Posted on Oct 16, 2009
Small component called a diode. Open up the microwave and try to find a black (usually) component that is most often connected between the magnetron (the thing that heats the food) and the chassis of the microwave oven (ground). I used to make a fortune replacing these! Costs about 5 bucks most appliance supply stores. Make darn sure you get one of the same value.
Posted on Apr 06, 2010
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