Hi,you have not stated how old this unit is ?
I think they are supposed to last for
4-5 years but I've known some to break after just one year and others
that worked great for 15 years or more.
Read more:
What is the average life span (during normal use) of a microwave oven? ' Answerbag http://www.answerbag.com/q_view/1540053#ixzz1TQlW7RlHCarbon Heating Lamp for microwave oven strong heat resistance. More than 6000hrs lifespan.
From a website...
7.3.7 Magnetron Life Expectancy
The
typical life of a magnetron tube is approximately 2000 hours of
operation. Some factors that can diminish the life of a magnetron are:
1) no-load operation, 2) operating with too much metal in the cooking
cavity, 3) line voltage consistently too low or too high, 4) improper
phasing, 5) improper installation or removal, 6) replacing associated
high-voltage components with substitutes that are incompatible with the
system design, 6) continual operation at the upper limit of its heat
tolerance due to inadequate air circulation, 7) obstruction in the
wave-guide, 8) failed stirrer operation.
---------
We use
ours about 15 mins a day which would mean 2000 hours would be reached in
22 years but as they say there are a lot of factors which may reduce
its life. The design and parameters of the oven will make a
considerable difference. E.G. A highish power magnetron always
underrun will last much longer than a smaller one run at its max
ratings.
A restaurant might reach 2000 hours in only a year or
so and industrial machines whether for cooking food or other processes
will require frequent magnetron replacement.
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