Question about Ovens
My take on your problem is that you have water (condensation) trapped up in the plastic part that houses the magnetron. When the microwave runs it also heats this water up and then after it stops this water is still up there boiling away....I would say that it is time to take that thing apart but you have to be extremely careful with the high voltage capacitors that a microwave contains.....
Also check for cracks in the plastic on the sides or top where water vapor could have escaped into the top of the microwave. If you take it apart and dry it out then you need to make sure it is sealed so no more water can get there.
Posted on Sep 03, 2010
Assuming operation is normal otherwise, this is most likely either a fan or other motor vibrating on its mounts, fan blades hitting something, or some sheet metal or the high voltage power transformer laminations vibrating. There may be something stuck under the turntable or above the waveguide cover interfering with the stirrer. Something may have loosened up with age and use.
If the noise is caused be simple vibrations, no damage is likely to result. However, if the main cooling fan is on its way out and it stops or gets stuck, parts will overheat quite quickly at which point the oven will shut down, hopefully and there could be damage to the magnetron or other components. Therefore, at least identifying the cause is probably a good idea.
The solution may be as simple as tightening a screw or weging a shim between two pieces of vibrating sheet metal.
Posted on Sep 02, 2010
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Posted on Jan 02, 2017
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