I have a Magic Chef microwave oven (700 watts) that
appears to have lost some cooking power. After one
minute, a cup of water is still not very hot, and a soup
that is supposed to take 1:15 is not very hot after 2 mins.
Can this happen and why?
They not only can, they do. I have a Sanyo that is about 20+ years old
and is doing the same thing. I posted about it here a year or more ago,
and was told the mag tube gets weak. For now I am just living with it,
as it still does pretty well, I like the controls on it, and I just
haven't gotten around to switching the oven out. I have several others
that I have gotten from here and there for next to nothing (yard sales,
pawn shops etc.) and if/when the Sanyo gets too slow to be of any use,
I'll toss it and try one of the others. Low voltage to the unit can also
cause the problem, so you may check that. Unless you have a fancy
built-in that is part of a conventional oven, they are throwaway now.
You can buy a new microwave for less than the wholesale cost of a
replacement tube, or practically any other part on it for that matter.
Thanks guys. I had a short extension cord on it, but
it always seemed OK. Just to make sure though I moved
it to another location and plugged it directly into an
outlet. Same problem.
I'd doubt this unit is even 10 years old, however.
But you are right. I saw an 1100 watt GE at the
Walmart for $65.
Is this a Magic Chef that is part of a combined unit with a range? If old,
they won't repair them any longer. But you can buy a new Maytag microwave
that will mount the same as the Magic Chef one.
Don <www.donwiss.com> (e-mail link at home page bottom).
Wow, I've always allowed two minutes to heat water, for soup or
something, and even then it's not boiling. And I thought my unit was
Maybe my unit is smaller than I recall.
I'm just guessing, but iiuc the microwave is designed to have the
frequency of the resonant frequency of a water molecule. Or maybe a
harmonic. I think if any part is the oscillator circuit were to
change its value, the oscillation frequency would change and it
wouldn't heat water as well.
You know it's not really magic. There are reasons why it works.
and the strong magnet, a part of that "tube" assembly, isn't
as strong anymore either.
Most use the "1 cup of water to-boil" time test. When the
time doubles, it's time to start shopping for a new one.
-larry / dallas
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