Electrolux E30IC80QSS Owner's Manual

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Setting Surface Controls
Operational noises
The  electronics  generating  the  induction  fields  are
pretty much noiseless but they do produce heat 
at high power level. A soft-sounding cooling fan 
activates when the unit is running multiple cooking 
zones at once or when a cooking zone is set at very 
high power settings.
The buzzing sound you could hear from your cooktop 
is not coming from the electronics but from the 
cookware you are using. Here are some causes of 
this noise:
•  Most induction-ready cookware are made of several 
layers of materials. An encapsulated steel layer is 
usually  used  to  harness  the  induction  field  and
transform it into heat, which is then transferred to 
the other materials by radiant energy. The induction 
field  will  cause  the  steel  layer  to  vibrate  against
the other materials in which it is encapsulated. 
This is the most common cause of noise from the 
induction process. This buzzing only happens at 
the higher power level settings. Note that high 
quality cookware manufacturers weld this steel 
layer in place which lowers or cancel this noise.
•  Light weight cookware may also vibrate. 
We recommend using heavy weight quality 
cookware.
•  Cookware with warped bottoms can vibrate on the 
ceramic glass surface at high power settings.
 The power output of your induction 
cooktop is capable of warping an empty pan. Never 
use the higher power settings on an empty pan. 
Even the highest quality cookware is vulnerable to 
warping.
•  Riveted handles on cookware can also cause 
buzzing sounds from the vibrations.
•  Solid cast iron and enamelware cookware should 
not emit any noise. Top quality cookware made of 
several layers should also be relatively quiet.