GE PT970SMSS Owner's Manual page 7

ARCING
If you see arcing, press the CLEAR/OFF pad and correct the problem.
Arcing is the microwave term for sparks in the
oven. Arcing is caused by:
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Metal or foil touching the side of the oven.
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Foil not molded to food (upturned edges
act like antennas).
SUPER HEATED WATER
Microwaved water and other liquids do not always bubble when they reach the boiling point.
They can actually get super heated and not bubble at all.
Super heated liquid will bubble up out of
the cup when it is moved or when something
like a spoon or tea bag is put into it.
To prevent this from happening and causing
injury, do not heat any liquid for more than
2 minutes per cup.
After heating, let the cup stand in the
microwave for 30 seconds before moving
it or putting anything into it.
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Metal, such as twist-ties, poultry pins or
gold-rimmed dishes in the microwave.
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Recycled paper towels containing small
metal pieces being used in the microwave.
Spontaneous boiling
Under certain special circumstances, liquids
may start to boil during or shortly after removal
from the microwave oven.
To prevent burns from splashing liquid, we
recommend the following before removing
the container from the oven:
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Allow the container to stand in the oven
for 30 to 40 seconds after the oven has
shut off.
s
Do not boil liquids in narrow-necked
containers such as soft drink bottles, wine
flasks and especially narrow-necked coffee
cups. Even if the container is opened,
excessive steam can build up and cause
it to burst or overflow.
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